{"id":801934,"date":"2024-11-27T10:19:00","date_gmt":"2024-11-27T04:49:00","guid":{"rendered":"https:\/\/leverageedu.com\/discover\/?p=801934"},"modified":"2024-11-27T10:19:00","modified_gmt":"2024-11-27T04:49:00","slug":"exam-prep-pipes-and-cistern-questions","status":"publish","type":"post","link":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/","title":{"rendered":"20+ Pipes and Cistern Questions and Answers | Quantitative Aptitude"},"content":{"rendered":"\n<p>Pipes and cistern questions are mostly the trickiest questions to solve in an examination. To handle the questions in the best possible manner, you can start practicing them today. Practice makes a man perfect and more accurate in solving problems. These types of questions generally appear in the banking exams, SSC, RRB, insurance, Olympiads, and others. To secure your place in this competitive examination, practice the questions today.<\/p>\n\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Formulas To Solve Pies and Cistern Questions<\/h2>\n\n\n\n<p>here are some basic formulas that will help you to solve the Pipes and cistern questions with them. Remember these formulas may not be enough for each question, you have to practice more questions to bring flow in solving questions.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>If it will take x hours to fill a tank, then half the tank will be filled in <strong>1 hr =1\/x<\/strong><\/li>\n\n\n\n<li>In the event that y hours are expected to discharge the tank, partly exhausted in<strong> 1 hour = 1\/y<\/strong><\/li>\n\n\n\n<li>If a line can fill a tank in x hours and can discharge a similar tank in y hours. At the point when both the lines are opened simultaneously, then, at that point, the net piece of the tank filled in <strong>1 hr = {(xy)\/(y-x)}, gave y&gt;x<\/strong><\/li>\n\n\n\n<li>If a line can fill a tank in x hours and can exhaust a similar tank in y hours. At the point when both the lines are opened simultaneously, then, at that point, the net piece of the tank filled in<strong> 1 hr = {(xy)\/(x-y)}, gave x&gt;y<\/strong><\/li>\n\n\n\n<li>Net work done = (Amount of work done by Gulfs) &#8211; (Amount of work done by Outlets)<\/li>\n\n\n\n<li>One gulf can fill the tank in x hr and the other channel can fill the similar tank in y hrs, assuming both the bays are opened simultaneously, the time taken to fill the entire tank <strong>= {(xy)\/(y+x)}<\/strong><\/li>\n\n\n\n<li>If two lines take x and y hours separately to fill a tank of water and a third line is opened which takes z hours to exhaust the tank, then, at that point, the time taken to fill the tank =<strong> {1\/(1\/x)+(1\/y)+(1\/z)} and the net piece of the tank filled in 1 hr = (1\/x)+(1\/y)- (1\/z).<\/strong><\/li>\n<\/ul>\n\n\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-pipes-and-cistern-questions-and-answers\">Pipes and Cistern Questions and Answers<\/h2>\n\n\n\n<p>Below you can find different questions and answers related to Pipes and Cisterns:<\/p>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1703141410811\"><strong class=\"schema-faq-question\">Q1:Two pipes A and B can separately fill a cistern in 60 min and 75 min respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes are simultaneously opened, then the cistern is full in 50 min. In how much time, the third pipe alone can empty the cistern ?<\/strong> <p class=\"schema-faq-answer\">85 Min.<br\/>95 Min.<br\/>105 Min.<br\/>105 Min.<br\/><br\/>Answer: D) 100 min<br\/>Explanation:<br\/>Work done by the third pipe in 1 min = 1\/50 &#8211; (1\/60 + 1\/75) = &#8211; 1\/100.<br\/>[-ve sign means emptying]<br\/>The third pipe alone can empty the cistern in 100 min.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703142357011\"><strong class=\"schema-faq-question\">Q2: A water tank is two-fifth full.Pipe A can fill a tank in 10 minutes and pipe B can empty it in 6 minutes.If both the pipes are open,how long will it take to empty or fill the tank completely?<\/strong> <p class=\"schema-faq-answer\">6 min.to empty<br\/>9 min. to empty<br\/>10min. to fill<br\/>6 min. to fill<br\/><br\/>Answer: A<br\/>Explanation:<br\/>Clearly,pipe B is faster than pipe A and so,the tank will be emptied.<br\/>part to be emptied = 2\/5<br\/>part emptied by (A+B) in 1 minute = (16\u2212110)=11516-110=115<br\/>115:25::1:x115:25::1:<br\/>25*15=6mins25*15=6<br\/>so, the tank will be emptied in 6 minutes`<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703142577515\"><strong class=\"schema-faq-question\">Q3: A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?<\/strong> <p class=\"schema-faq-answer\">2hrs 45 min<br\/>3hrs 25 min<br\/>1hr 20 min<br\/>2hr 20min<br\/><br\/>Answer: B<br\/>Explanation:<br\/>Time taken by one tap to fill <strong>half of the tank<\/strong> = 3 hrs.<br\/>Part filled by the four taps in 1 hour =4*1\/6 =2\/3<br\/>Remaining part =(1\u221212)=121-12=12<br\/>23:12::1:x23:12::1<br\/>=> x = (12*1*32)=3412*1*32=34<br\/>So, total time taken = 3 hrs. 45 mins.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703142579272\"><strong class=\"schema-faq-question\">Q4: A pump can fill a tank with water in 2 hours. Because of a leak, it took 213213 hours to fill the tank. The leak can drain all the water of the tank in:<\/strong> <p class=\"schema-faq-answer\">11 Hours<br\/>10 Hours<br\/>9 Hours<br\/>14 Hours<br\/><br\/>Answer: D<br\/>Explanation:<br\/>If the total area of pump=1 part<br\/>The pumop take 2 hrs to fill 1 part\u00a0<br\/>The pumop take1 hour to fill 1\/2 portion\u00a0<br\/>Due to lickage<br\/>The pumop take 7\/3 hrs to fill 1 part\u00a0<br\/>The pumop take1 hour to fill 3\/7 portion\u00a0<br\/>Now the difference of area = (1\/2-3\/7)=1\/14\u00a0<br\/>This 1\/14 part of water drains in 1 hour\u00a0<br\/>Total area=1 part of water drains in (1&#215;14\/1)hours= 14 hours\u00a0<br\/>So the leak can drain all the water of the tank in 14 hours.\u00a0<br\/>Leak will empty the tank in 14 hrs<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703142580399\"><strong class=\"schema-faq-question\">Q5: A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in ?<\/strong> <p class=\"schema-faq-answer\">20 Hours<br\/>10 Hours<br\/>9 Hours<br\/>21 Hours<br\/><br\/>Answer: A) 20 hrs<br\/>Explanation:<br\/>1\/8 &#8211; 1\/x = 1\/10<br\/>\u00a0=> x = 40 hrs<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703142850861\"><strong class=\"schema-faq-question\">Q6: Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the tank is:<\/strong> <p class=\"schema-faq-answer\">23<br\/>43<br\/>14<br\/>18<br\/><br\/>Answer: C<br\/>Explanation:<br\/>Part filled in 2 hours = 2\/6=1\/3<br\/>Remaining part =(1\u221213)=231-13=23<br\/>\u00a0(A + B)&#8217;s 7 hour&#8217;s work = 2\/3<br\/>(A + B)&#8217;s 1 hour&#8217;s work = 2\/21<br\/>C&#8217;s 1 hour&#8217;s work = { (A + B + C)&#8217;s 1 hour&#8217;s work } &#8211; { (A + B)&#8217;s 1 hour&#8217;s work }<br\/>=1\/6-2\/21 = 1\/14<br\/>C alone can fill the tank in 14 hours.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703142852121\"><strong class=\"schema-faq-question\">Q7: A cistern has a leak which would empty the cistern in 20 minutes. A tap is turned on which admits 4 liters a minute into the cistern, and it is emptied in 24 minutes. How many liters does the cistern hold ?<\/strong> <p class=\"schema-faq-answer\">400 lit   <br\/>480 lit   <br\/>500 lit   <br\/>580 lit <br\/><br\/> Answer: B<br\/>Explanation:<br\/>1\/k &#8211; 1\/20 = -1\/24<br\/>k = 120<br\/>120 x 4 = 480<br\/>Therefore, the capacity of the cistern is 480 liters.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703142853395\"><strong class=\"schema-faq-question\">Q8: Taps X and Y can fill a tank in 30 and 40 minutes respectively.Tap Z can empty the filled tank in 60 minutes.If all the three taps are kept open for one minute each,how much time will the taps take to fill the tank?<\/strong> <p class=\"schema-faq-answer\">15min.<br\/>10min.<br\/>24min.<br\/>20min.<br\/><br\/>Answer: C<br\/>Explanation:<br\/>Given taps X and Y can fill the tank in 30 and 40 minutes respectively. Therefore,<br\/>part filled by tap X in 1 minute = 1\/30<br\/>part filled by tap Y in 1 minute = 1\/40<br\/>Tap Z can empty the tank in 60 minutes. Therefore,<br\/>part emptied by tap Z in 1 minute = 1\/60<br\/>Net part filled by Pipes X,Y,Z together in 1 minute = [1\/30 +1\/40 &#8211; 1\/60] = 5\/120 = 1\/24<br\/>i.e., the tank can be filled in 24 minutes.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703143352740\"><strong class=\"schema-faq-question\">Q9: A large tanker can be filled by two pipes A and B in 60 and 40 minutes respectively. How many minutes will it take to fill the tanker from empty state if B is used for half the time and A and B fill it together for the other half ?<\/strong> <p class=\"schema-faq-answer\"> 50 min.   <br\/>45 min.  <br\/>60 min.   <br\/>30 min.<br\/><br\/>Answer: D<br\/>Explanation:<br\/>Part filled by (A + B) in 1 minute = (1\/60 + 1\/40) = 1\/24<br\/>Suppose the tank is filled in x minutes.<br\/>Then, x\/2(1\/24 + 1\/40) = 1<br\/>(x\/2) * (1\/15) = 1 => x = 30 min.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703143353870\"><strong class=\"schema-faq-question\">Q10: 12 buckets of water fill a tank when the capacity of each tank is 13.5 liters. How many buckets will be needed to fill the same tank,if the capacity of each bucket is 9 liters?<\/strong> <p class=\"schema-faq-answer\">10   <br\/>12   <br\/>30   <br\/>18  <br\/><br\/>Answer: D<br\/>Explanation:<br\/>Capacity of the tank =(12 x 13.5) liters =162 liters.<br\/>Capacity of each bucket =9 liters<br\/>Number of buckets needed = 162\/9 =18.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703143355110\"><strong class=\"schema-faq-question\">Q11: Water flows into a tank which is 200 m long and 150 m wide, through a pipe of cross-section (0.3m x 0.2m) at 20 km\/h. In what time will the water level be 12m ?<\/strong> <p class=\"schema-faq-answer\">200 hours<br\/>100 hours<br\/>300 hours<br\/>400 hours<br\/><br\/>Answer: C<br\/>Explanation:<br\/>Volume of water collected in the tank in 1 hour<br\/>\u21d2 (0.3 \u00d7 0.2 \u00d7 20km \u00d7 1000mts) = 1200 m cubic<br\/>If after t hours, the water is at height of 12m,<br\/>1200t=200\u00d7150\u00d712\u00a0<br\/>\u21d2 t = 300 Hours.<br\/><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703143356236\"><strong class=\"schema-faq-question\"><strong>Q12:<\/strong> Two pipes can fill a tank in 6 hours and 8 hours respectively while a third pipe empties the full tank in 12 hours. If all the three pipes operate simultaneously, in how much time will the tank be filled?<\/strong> <p class=\"schema-faq-answer\">7(1\/2) hrs<br\/>4(4\/5) hrs<br\/>3 (2\/7) hrs<br\/>1(1\/5) hrs<br\/><br\/>Answer: B<br\/><br\/>Explanation: Speed of the man (upstream) = (4 \/ 40 * 60) km\/hr<br\/>= 6 km\/hr<br\/>Speed of the man (downstream) = ( 4 \/ 36 * 60) km\/hr<br\/>= (60 \/ 9)km\/hr<br\/>= 20\/3 km\/h<br\/>Rate of the current = \u00bd[downstream speed \u2013 upstream speed]<br\/>= (1\/2) [ 20 \/ 3 \u2013 6] km\/hr<br\/>Rate of the current = 1\/3 km\/hr<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703157455088\"><strong class=\"schema-faq-question\"><strong>Q13:<\/strong> Two pipes can fill a tank in 10 and 14 minutes respectively and a waste pipe can empty 4 gallons per minute. If all the pipes working together can fill the tank in 6 minutes, what is the capacity of the tank?<\/strong> <p class=\"schema-faq-answer\">120 gallons<br\/>240 gallons<br\/>450 gallons<br\/>840 gallons<br\/><br\/>Answer:D<br\/><br\/><strong>Explanation:<br\/><\/strong>Work done by waste pipe in 1 min = (Part filled by total pipes together) -(part filled by first pipe + part filled by second pipe)<br\/>= 1\/6 \u2013 [(1\/10) + (1\/14)] = 1\/6 \u2013 (24\/140) = -1\/210<br\/>Here, negative (-) sign indicates emptying of tank.<br\/><br\/>To find the capacity, we need to determine the volume of 1\/210 part.<br\/>Therefore, volume of 1\/210 part = 4 gallons &#8212;&#8212;&#8212;(given condition)<br\/>Hence, the capacity of tank = volume of whole = 4 x 210 = 840 gallons.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703157456107\"><strong class=\"schema-faq-question\"><strong>\u00a0Q14:<\/strong> A booster pump can be used to fill as to empty the tank. The capacity of the tank is 1200 m<sup>3<\/sup>. The emptying capacity of the tank is 10 m<sup>3<\/sup> per minute higher than its filling capacity and the pump requires 4 minutes lesser to vacant the tank than it requires to fill it. Calculate the filling capacity of the pump.<\/strong> <p class=\"schema-faq-answer\">25<br\/>50<br\/>75<br\/>100<br\/><br\/>Answer : B<br\/><br\/><strong>Explanation:<br\/><\/strong>Assume that the filling capacity of the pump = x m<sup>3<\/sup>\/min<br\/>Given condition : Emptying capacity of the tank is 10 m<sup>3<\/sup> per minute higher than its filling capacity. This means that the emptying capacity of the pump is = x + 10 m<sup>3<\/sup>\/min<br\/><br\/>We need to filling the capacity of pump from the given relation of filling &amp; emptying capacities. Hence, we can write that,<br\/>1200 \/ x &#8211; 1200\/ x+ 10 = 4<br\/><br\/>[1\/x \u2013 1\/ x+10] = 1\/300<br\/>By solving the above equation, we get the simplified form of quadratic equation.<br\/>So, x<sup>2<\/sup> + 10x -3000 = 0<br\/>(x + 60) (x-50) = 0<br\/><br\/>Therefore, we get two values of &#8216;x&#8217;; i.e. x = -60 &amp; x =50<br\/><br\/>Since we are asked to find the filling capacity, which is always positive; we will neglect the negative value of x = \u201360.<br\/>Therefore, the filling capacity of the pump = 50 m<sup>3<\/sup>\/min.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703157457207\"><strong class=\"schema-faq-question\"><strong>Q 15.<\/strong> An electric pump can fill a tank in 4 hours. Due to leakage in the tank, it took 4(1\/2) hrs to fill the tank. If the tank is full, how much time will the leak take to empty the full tank?<\/strong> <p class=\"schema-faq-answer\">8 hrs<br\/>16 hrs<br\/>21 hrs<br\/>36 hrs<br\/><br\/>Answer: D<br\/><br\/><strong>Explanation:<\/strong><br\/>Consider a pipe fills the tank in &#8216;x&#8217; hrs. If there is a leakage in the bottom, the tank is filled in &#8216;y&#8217; hrs.<br\/>The time taken by the leak to empty the full tank =<br\/>xyhrs \/ y \u2013 x<br\/><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703157458251\"><strong class=\"schema-faq-question\"><strong>Q16.<\/strong> Two pipes fills a cistern in 15 hrs and 20 hrs respectively. The pipes are opened simultaneously and it is observed that it took 26 min more to fill the cistern because of leakage at the bottom. If the cistern is full, then in what time will the leak empty it?<\/strong> <p class=\"schema-faq-answer\">35 hrs<br\/>70 hrs<br\/>180 hrs<br\/>300 hrs<br\/><br\/>The time taken by the leak to empty the full tank =<br\/>xy hrs \/ y \u2013 x<br\/><br\/>Time taken to empty the tank by the leak = 4 x (9\/2) \/ (9\/2 ) &#8211; 4 = (36\/2 ) \/ \u00bd = 18\/ \u00bd = 18 x 2 = 36 hrs<br\/><br\/>But, direct values of x &amp; y are not given. So, we need to find the work done by the two pipes in 1 hr = (1\/15) + (1\/20) = 7\/60<br\/>Hence, the time taken by these pipes to fill the tank = 60\/7 hrs = 8 .57 hrs = 8 hrs 34 min &#8212;&#8212;&#8211;( by multiplying &#8216;0.57&#8217; hrs x 60 = 34 minutes)<br\/>Due to leakage, time taken = 8 hrs 34 min + 26 min = 8 hrs 60 min = 9 hrs &#8212;&#8212;&#8212;-( because 60 min = 1 hr)<br\/>Thus, work done by (two pipes + leak) in 1 hr = 1\/9<br\/>Hence, work done by leak in 1 hr = work done by two pipes \u2013 1\/9<br\/>= 7 \/60 \u2013 1\/9 = 3\/ 540 = 1\/180<br\/>Therefore, leak will empty the full cistern in 180 hours.<br\/><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703158895987\"><strong class=\"schema-faq-question\"><strong>Q17.<\/strong> If two pipes function simultaneously, the reservoir will be filled in 24 hrs. One pipe fills the reservoir 20 hours faster than the other. How many hours does it take for the second pipe to fill the reservoir?<\/strong> <p class=\"schema-faq-answer\">12 hrs<br\/>30 hrs<br\/>44 hrs<br\/>60 hrs<br\/><br\/>Answer: D<br\/><br\/><strong>Explanation:<br\/><\/strong>Assume that the reservoir is filled by first pipe in &#8216;x&#8217; hours.<br\/>So, the reservoir is filled by second pipe in &#8216;x + 20&#8217; hours.<br\/>Now, from these above conditions, we can form the equations as,<br\/><br\/>1\/x + 1\/ (x + 20) = 1\/24<br\/><br\/>[x + 20 + x] \/ [x(x + 20)] = 1\/24<br\/><br\/>x<sup>2<\/sup> \u2013 28x \u2013 480 = 0<br\/><br\/>By solving this quadratic equation , we get the factors (x \u2013 40) (x+12) = 0<br\/>Hence, we get two values : x = 40 &amp; x = -6<br\/>Since filling of reservoir is positive work , we can neglect the negative value of &#8216;x&#8217;.<br\/>Thus, x = 40<br\/><br\/>This means that the second pipe will take (x+ 20) hrs = 40 + 20 = 60 hrs to fill the reservoir.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703158897222\"><strong class=\"schema-faq-question\"><strong>Q18.<\/strong> Two pipes can fill a tank in 8 hrs &amp; 6 hrs respectively. If they are opened on alternate hours and if pipe A gets opened first, then in how many hours, the tank will be full?<\/strong> <p class=\"schema-faq-answer\">6 hrs<br\/>7 hrs<br\/>8 hrs<br\/>14 hrs<br\/><br\/>Answer: B<br\/><br\/><strong>Explanation:<br\/><\/strong>Pipe A&#8217;s work in 1 hr = 1\/8<br\/>Pipe B&#8217;s work in 1 hr = 1\/6<br\/><br\/>Pipes (A+B)&#8217;s work in first 2 hrs when they are opened alternately = 1\/8 + 1\/6 = 7 \/24<br\/><br\/>Now,<br\/><br\/>In 4 hrs they fill : 2 X (7\/24) = 7\/12<br\/>In 6 hrs they fill : 3 X (7\/24) = 7\/8<br\/><br\/>After 6 hrs, part left empty = \u215b<br\/><br\/>Now it is A&#8217;s turn to open up.<br\/><br\/>In one hr it fills 1\/8 of the tank.<br\/><br\/>So, the tank will be full in = 6 hrs + 1 hr = 7 hrs<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703159448419\"><strong class=\"schema-faq-question\"><strong>Q19.<\/strong> It is observed that the pipe A can fill the tank in 15 hrs and the same tank is filled by pipe B in 20 hrs. The third pipe C can vacant the tank in 25 hrs. If all the pipes get opened initially and after 10 hrs, the pipe C is closed, then how long will it take to fill the tank?<\/strong> <p class=\"schema-faq-answer\">3 hrs<br\/>7 hrs<br\/>12 hrs<br\/>20 hrs<br\/><br\/>Answer: C<br\/><br\/><strong>Explanation:<br\/><\/strong>Assume that the tank will be full in &#8217;10 + x&#8217; hrs.<br\/><br\/>Part filled by pipe A in 1 hr = 1\/15<br\/>Part filled by pipe B in 1 hr = 1\/20<br\/>Part emptied by pipe C in 1 hr = 1\/ 25<br\/><br\/>(A+ B)&#8217;s part filled in 1 hr = 1\/15 + 1\/20 = 7 \/60<br\/><br\/>As Pipe C is closed after 10 hours, let us find the part of tank filled in 10 hrs.<br\/>Tank filled in 10 hrs = 10 (part filled by A in 1 hr + part filled by B in 1 hr\u2013 part emptied by C in 1 hr)<br\/>= 10 [1\/15 + 1\/20 \u2013 1\/25] = 23 \/30<br\/><br\/>Remaining part = 1 \u2013 part filled in 10 hours<br\/>= 1 \u2013 23\/30 = 7\/30<br\/><br\/>We know that,<br\/>Part filled by (A + B) in 1 hr : Total part filled<br\/><br\/>Remaining part : Time taken<br\/><br\/>So, we get the ratio as ,<br\/>7\/60 : 7\/30 :: 1 : x<br\/>So, the value of x = 2\/30 x 1 x 60\/7 = 2 hrs.<br\/>Hence, the tank will be full in x + 2 = 10 + 2 hrs = 12 hrs<br\/><br\/><br\/><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703159450124\"><strong class=\"schema-faq-question\"><strong>Q20.<\/strong> Two pipes A &amp; B can fill a tank in 5 min &amp; 10 min respectively. Both the pipes are opened together but after 2 min, pipe A is turned off. What is the total time required to fill the tank?<\/strong> <p class=\"schema-faq-answer\">4 min<br\/>6 min<br\/>14 min<br\/>20 min<br\/><br\/>Answer: B<br\/><strong>Explanation:<br\/><\/strong>Assume the total time required = x + 2 min<br\/>Part filled by pipe A in 1min = 1\/5 &amp; part filled by B in 1 min = 1\/10<br\/>After 2 min, part filed by A &amp; B together = 2 [ 1\/5 + 1\/10] = 3\/5<br\/><br\/>Remaining part = 1 \u2013 3\/5 = 2\/5<br\/>Part filled by pipe B in 1 min = 1\/10<br\/><br\/>As pipe A is turned off after 2 minutes, we get the relation as,<br\/><br\/>Part filled by (A + B) in 1 hr : Total part filled<br\/><br\/>Remaining part : Time taken<br\/><br\/>1\/10 : 2\/5 :: 1: x<br\/>x = (2\/5) x 1 x 10 = 4 min<br\/>Tank will be full in ( 2 min + 4 min) = 6 min<br\/><\/p> <\/div> <\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-faqs\">FAQs<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1703160199629\"><strong class=\"schema-faq-question\">How do you solve pipe problems in aptitude?<\/strong> <p class=\"schema-faq-answer\">Read the question multiple times and try to answer the query with the application of simplest formulas and using common sense.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703160250711\"><strong class=\"schema-faq-question\">In which exam does Pipes and Cistern Questions come?<\/strong> <p class=\"schema-faq-answer\">There are various exams like bank exams, SSC, RRB, Insurance, Olympiads and others in which these types of questions actually comes in.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1703160252110\"><strong class=\"schema-faq-question\">Is this tuff to solve these types of problems?<\/strong> <p class=\"schema-faq-answer\">No by using common sense and correct formulas you can easily solve these types of questions.<\/p> <\/div> <\/div>\n\n\n\n<p class=\"has-text-align-center has-vivid-red-color has-text-color has-link-color wp-elements-d851cef9692c6e162610b220d8c10a79\"><strong>RELATED POSTS<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><tbody><tr><td><a href=\"https:\/\/leverageedu.com\/discover\/indian-exams\/questions-of-letter-and-symbol-series\/\"><strong>45+ Questions of Letter and Symbol Series with Answers<\/strong><\/a><\/td><td><a href=\"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-blood-relation-reasoning-questions\/\"><strong>Blood Relation Reasoning Questions | Verbal Reasoning<\/strong><\/a><\/td><\/tr><tr><td><a href=\"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-questions-of-series-completion-reasoning\/\"><strong>Series Completion Reasoning | Verbal Reasoning |<\/strong><\/a><\/td><td><a href=\"https:\/\/leverageedu.com\/blog\/reasoning-questions\/\"><strong>Types of Reasoning Questions in Competitive Exams<\/strong><\/a><\/td><\/tr><tr><td><a href=\"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-questions-of-direction-sense-test-reasoning\/\"><strong>Questions of Direction Sense Test Reasoning | Verbal Reasoning<\/strong><\/a><\/td><td><a href=\"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-questions-of-arithmetic-reasoning\/\"><strong>20+ Questions of Arithmetic Reasoning | Verbal Reasoning<\/strong><\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>This was all about the&nbsp;<strong>\u201c20+ Pipe and Cistern Questions and Answers\u201d<\/strong>. For more such informative blogs, check out our&nbsp;<a href=\"https:\/\/leverageedu.com\/discover\/category\/indian-exams\/study-material\/\"><strong>Study Material Section<\/strong><\/a>, or you can learn more about us by visiting our&nbsp;<a href=\"https:\/\/leverageedu.com\/discover\/category\/indian-exams\/\"><strong>Indian exams<\/strong><\/a>&nbsp;page.<a href=\"https:\/\/www.facebook.com\/sharer.php?u=https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-height-and-distance-questions-and-answers\/\"><\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"Pipes and cistern questions are mostly the trickiest questions to solve in an examination. To handle the questions&hellip;\n","protected":false},"author":102,"featured_media":847751,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"editor_notices":[],"footnotes":""},"categories":[369,484,396],"tags":[],"class_list":{"0":"post-801934","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-indian-exams","8":"category-quantitative-aptitude","9":"category-study-material"},"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>20+ Pipes and Cistern Questions and Answers | Quantitative Aptitude | Leverage Edu Discover<\/title>\n<meta name=\"description\" content=\"In this blog, we give students a list of solved pipes and cistern questions which will be useful for their exam prep.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"20+ Pipes and Cistern Questions and Answers | Quantitative Aptitude\" \/>\n<meta property=\"og:description\" content=\"In this blog, we give students a list of solved pipes and cistern questions which will be useful for their exam prep.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/\" \/>\n<meta property=\"og:site_name\" content=\"Leverage Edu Discover\" \/>\n<meta property=\"article:published_time\" content=\"2024-11-27T04:49:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/9\/2023\/12\/15095551\/Pipes-and-Cistern-Questions-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"640\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"parul1\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"parul1\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"17 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"20+ Pipes and Cistern Questions and Answers | Quantitative Aptitude | Leverage Edu Discover","description":"In this blog, we give students a list of solved pipes and cistern questions which will be useful for their exam prep.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/","og_locale":"en_US","og_type":"article","og_title":"20+ Pipes and Cistern Questions and Answers | Quantitative Aptitude","og_description":"In this blog, we give students a list of solved pipes and cistern questions which will be useful for their exam prep.","og_url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/","og_site_name":"Leverage Edu Discover","article_published_time":"2024-11-27T04:49:00+00:00","og_image":[{"width":1024,"height":640,"url":"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/9\/2023\/12\/15095551\/Pipes-and-Cistern-Questions-1.png","type":"image\/png"}],"author":"parul1","twitter_card":"summary_large_image","twitter_misc":{"Written by":"parul1","Est. reading time":"17 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#article","isPartOf":{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/"},"author":{"name":"parul1","@id":"https:\/\/leverageedu.com\/discover\/#\/schema\/person\/78626df72e95cac3ca256d28d1e593d2"},"headline":"20+ Pipes and Cistern Questions and Answers | Quantitative Aptitude","datePublished":"2024-11-27T04:49:00+00:00","mainEntityOfPage":{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/"},"wordCount":2626,"commentCount":0,"image":{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#primaryimage"},"thumbnailUrl":"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/9\/2023\/12\/15095551\/Pipes-and-Cistern-Questions-1.png","articleSection":["Indian Exams","Quantitative Aptitude","Study Material"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#respond"]}]},{"@type":["WebPage","FAQPage"],"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/","url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/","name":"20+ Pipes and Cistern Questions and Answers | Quantitative Aptitude | Leverage Edu Discover","isPartOf":{"@id":"https:\/\/leverageedu.com\/discover\/#website"},"primaryImageOfPage":{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#primaryimage"},"image":{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#primaryimage"},"thumbnailUrl":"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/9\/2023\/12\/15095551\/Pipes-and-Cistern-Questions-1.png","datePublished":"2024-11-27T04:49:00+00:00","author":{"@id":"https:\/\/leverageedu.com\/discover\/#\/schema\/person\/78626df72e95cac3ca256d28d1e593d2"},"description":"In this blog, we give students a list of solved pipes and cistern questions which will be useful for their exam prep.","breadcrumb":{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#breadcrumb"},"mainEntity":[{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703141410811"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142357011"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142577515"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142579272"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142580399"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142850861"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142852121"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142853395"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703143352740"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703143353870"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703143355110"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703143356236"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703157455088"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703157456107"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703157457207"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703157458251"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703158895987"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703158897222"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703159448419"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703159450124"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703160199629"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703160250711"},{"@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703160252110"}],"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#primaryimage","url":"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/9\/2023\/12\/15095551\/Pipes-and-Cistern-Questions-1.png","contentUrl":"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/9\/2023\/12\/15095551\/Pipes-and-Cistern-Questions-1.png","width":1024,"height":640,"caption":"Pipes and Cistern Questions"},{"@type":"BreadcrumbList","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/leverageedu.com\/discover\/"},{"@type":"ListItem","position":2,"name":"20+ Pipes and Cistern Questions and Answers | Quantitative Aptitude"}]},{"@type":"WebSite","@id":"https:\/\/leverageedu.com\/discover\/#website","url":"https:\/\/leverageedu.com\/discover\/","name":"Leverage Edu Discover","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/leverageedu.com\/discover\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/leverageedu.com\/discover\/#\/schema\/person\/78626df72e95cac3ca256d28d1e593d2","name":"parul1","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/6f9088cf8478d17e6cd436c71da21ec8657a1f9ab3358a1415689fc98e1e8786?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/6f9088cf8478d17e6cd436c71da21ec8657a1f9ab3358a1415689fc98e1e8786?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/6f9088cf8478d17e6cd436c71da21ec8657a1f9ab3358a1415689fc98e1e8786?s=96&d=mm&r=g","caption":"parul1"},"url":"https:\/\/leverageedu.com\/discover\/author\/parul1\/"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703141410811","position":1,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703141410811","name":"Q1:Two pipes A and B can separately fill a cistern in 60 min and 75 min respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes are simultaneously opened, then the cistern is full in 50 min. In how much time, the third pipe alone can empty the cistern ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"85 Min.<br\/>95 Min.<br\/>105 Min.<br\/>105 Min.<br\/><br\/>Answer: D) 100 min<br\/>Explanation:<br\/>Work done by the third pipe in 1 min = 1\/50 - (1\/60 + 1\/75) = - 1\/100.<br\/>[-ve sign means emptying]<br\/>The third pipe alone can empty the cistern in 100 min.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142357011","position":2,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142357011","name":"Q2: A water tank is two-fifth full.Pipe A can fill a tank in 10 minutes and pipe B can empty it in 6 minutes.If both the pipes are open,how long will it take to empty or fill the tank completely?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"6 min.to empty<br\/>9 min. to empty<br\/>10min. to fill<br\/>6 min. to fill<br\/><br\/>Answer: A<br\/>Explanation:<br\/>Clearly,pipe B is faster than pipe A and so,the tank will be emptied.<br\/>part to be emptied = 2\/5<br\/>part emptied by (A+B) in 1 minute = (16\u2212110)=11516-110=115<br\/>115:25::1:x115:25::1:<br\/>25*15=6mins25*15=6<br\/>so, the tank will be emptied in 6 minutes`","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142577515","position":3,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142577515","name":"Q3: A tap can fill a tank in 6 hours. After half the tank is filled, three more similar taps are opened. What is the total time taken to fill the tank completely?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"2hrs 45 min<br\/>3hrs 25 min<br\/>1hr 20 min<br\/>2hr 20min<br\/><br\/>Answer: B<br\/>Explanation:<br\/>Time taken by one tap to fill <strong>half of the tank<\/strong> = 3 hrs.<br\/>Part filled by the four taps in 1 hour =4*1\/6 =2\/3<br\/>Remaining part =(1\u221212)=121-12=12<br\/>23:12::1:x23:12::1<br\/>=> x = (12*1*32)=3412*1*32=34<br\/>So, total time taken = 3 hrs. 45 mins.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142579272","position":4,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142579272","name":"Q4: A pump can fill a tank with water in 2 hours. Because of a leak, it took 213213 hours to fill the tank. The leak can drain all the water of the tank in:","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"11 Hours<br\/>10 Hours<br\/>9 Hours<br\/>14 Hours<br\/><br\/>Answer: D<br\/>Explanation:<br\/>If the total area of pump=1 part<br\/>The pumop take 2 hrs to fill 1 part\u00a0<br\/>The pumop take1 hour to fill 1\/2 portion\u00a0<br\/>Due to lickage<br\/>The pumop take 7\/3 hrs to fill 1 part\u00a0<br\/>The pumop take1 hour to fill 3\/7 portion\u00a0<br\/>Now the difference of area = (1\/2-3\/7)=1\/14\u00a0<br\/>This 1\/14 part of water drains in 1 hour\u00a0<br\/>Total area=1 part of water drains in (1x14\/1)hours= 14 hours\u00a0<br\/>So the leak can drain all the water of the tank in 14 hours.\u00a0<br\/>Leak will empty the tank in 14 hrs","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142580399","position":5,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142580399","name":"Q5: A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in its bottom. If the cistern is full, the leak will empty it in ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"20 Hours<br\/>10 Hours<br\/>9 Hours<br\/>21 Hours<br\/><br\/>Answer: A) 20 hrs<br\/>Explanation:<br\/>1\/8 - 1\/x = 1\/10<br\/>\u00a0=> x = 40 hrs","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142850861","position":6,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142850861","name":"Q6: Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. The number of hours taken by C alone to fill the tank is:","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"23<br\/>43<br\/>14<br\/>18<br\/><br\/>Answer: C<br\/>Explanation:<br\/>Part filled in 2 hours = 2\/6=1\/3<br\/>Remaining part =(1\u221213)=231-13=23<br\/>\u00a0(A + B)'s 7 hour's work = 2\/3<br\/>(A + B)'s 1 hour's work = 2\/21<br\/>C's 1 hour's work = { (A + B + C)'s 1 hour's work } - { (A + B)'s 1 hour's work }<br\/>=1\/6-2\/21 = 1\/14<br\/>C alone can fill the tank in 14 hours.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142852121","position":7,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142852121","name":"Q7: A cistern has a leak which would empty the cistern in 20 minutes. A tap is turned on which admits 4 liters a minute into the cistern, and it is emptied in 24 minutes. How many liters does the cistern hold ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"400 lit   <br\/>480 lit   <br\/>500 lit   <br\/>580 lit <br\/><br\/> Answer: B<br\/>Explanation:<br\/>1\/k - 1\/20 = -1\/24<br\/>k = 120<br\/>120 x 4 = 480<br\/>Therefore, the capacity of the cistern is 480 liters.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142853395","position":8,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703142853395","name":"Q8: Taps X and Y can fill a tank in 30 and 40 minutes respectively.Tap Z can empty the filled tank in 60 minutes.If all the three taps are kept open for one minute each,how much time will the taps take to fill the tank?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"15min.<br\/>10min.<br\/>24min.<br\/>20min.<br\/><br\/>Answer: C<br\/>Explanation:<br\/>Given taps X and Y can fill the tank in 30 and 40 minutes respectively. Therefore,<br\/>part filled by tap X in 1 minute = 1\/30<br\/>part filled by tap Y in 1 minute = 1\/40<br\/>Tap Z can empty the tank in 60 minutes. Therefore,<br\/>part emptied by tap Z in 1 minute = 1\/60<br\/>Net part filled by Pipes X,Y,Z together in 1 minute = [1\/30 +1\/40 - 1\/60] = 5\/120 = 1\/24<br\/>i.e., the tank can be filled in 24 minutes.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703143352740","position":9,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703143352740","name":"Q9: A large tanker can be filled by two pipes A and B in 60 and 40 minutes respectively. How many minutes will it take to fill the tanker from empty state if B is used for half the time and A and B fill it together for the other half ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":" 50 min.   <br\/>45 min.  <br\/>60 min.   <br\/>30 min.<br\/><br\/>Answer: D<br\/>Explanation:<br\/>Part filled by (A + B) in 1 minute = (1\/60 + 1\/40) = 1\/24<br\/>Suppose the tank is filled in x minutes.<br\/>Then, x\/2(1\/24 + 1\/40) = 1<br\/>(x\/2) * (1\/15) = 1 => x = 30 min.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703143353870","position":10,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703143353870","name":"Q10: 12 buckets of water fill a tank when the capacity of each tank is 13.5 liters. How many buckets will be needed to fill the same tank,if the capacity of each bucket is 9 liters?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"10   <br\/>12   <br\/>30   <br\/>18  <br\/><br\/>Answer: D<br\/>Explanation:<br\/>Capacity of the tank =(12 x 13.5) liters =162 liters.<br\/>Capacity of each bucket =9 liters<br\/>Number of buckets needed = 162\/9 =18.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703143355110","position":11,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703143355110","name":"Q11: Water flows into a tank which is 200 m long and 150 m wide, through a pipe of cross-section (0.3m x 0.2m) at 20 km\/h. In what time will the water level be 12m ?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"200 hours<br\/>100 hours<br\/>300 hours<br\/>400 hours<br\/><br\/>Answer: C<br\/>Explanation:<br\/>Volume of water collected in the tank in 1 hour<br\/>\u21d2 (0.3 \u00d7 0.2 \u00d7 20km \u00d7 1000mts) = 1200 m cubic<br\/>If after t hours, the water is at height of 12m,<br\/>1200t=200\u00d7150\u00d712\u00a0<br\/>\u21d2 t = 300 Hours.<br\/>","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703143356236","position":12,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703143356236","name":"Q12: Two pipes can fill a tank in 6 hours and 8 hours respectively while a third pipe empties the full tank in 12 hours. If all the three pipes operate simultaneously, in how much time will the tank be filled?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"7(1\/2) hrs<br\/>4(4\/5) hrs<br\/>3 (2\/7) hrs<br\/>1(1\/5) hrs<br\/><br\/>Answer: B<br\/><br\/>Explanation: Speed of the man (upstream) = (4 \/ 40 * 60) km\/hr<br\/>= 6 km\/hr<br\/>Speed of the man (downstream) = ( 4 \/ 36 * 60) km\/hr<br\/>= (60 \/ 9)km\/hr<br\/>= 20\/3 km\/h<br\/>Rate of the current = \u00bd[downstream speed \u2013 upstream speed]<br\/>= (1\/2) [ 20 \/ 3 \u2013 6] km\/hr<br\/>Rate of the current = 1\/3 km\/hr","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703157455088","position":13,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703157455088","name":"Q13: Two pipes can fill a tank in 10 and 14 minutes respectively and a waste pipe can empty 4 gallons per minute. If all the pipes working together can fill the tank in 6 minutes, what is the capacity of the tank?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"120 gallons<br\/>240 gallons<br\/>450 gallons<br\/>840 gallons<br\/><br\/>Answer:D<br\/><br\/><strong>Explanation:<br\/><\/strong>Work done by waste pipe in 1 min = (Part filled by total pipes together) -(part filled by first pipe + part filled by second pipe)<br\/>= 1\/6 \u2013 [(1\/10) + (1\/14)] = 1\/6 \u2013 (24\/140) = -1\/210<br\/>Here, negative (-) sign indicates emptying of tank.<br\/><br\/>To find the capacity, we need to determine the volume of 1\/210 part.<br\/>Therefore, volume of 1\/210 part = 4 gallons ---------(given condition)<br\/>Hence, the capacity of tank = volume of whole = 4 x 210 = 840 gallons.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703157456107","position":14,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703157456107","name":"\u00a0Q14: A booster pump can be used to fill as to empty the tank. The capacity of the tank is 1200 m3. The emptying capacity of the tank is 10 m3 per minute higher than its filling capacity and the pump requires 4 minutes lesser to vacant the tank than it requires to fill it. Calculate the filling capacity of the pump.","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"25<br\/>50<br\/>75<br\/>100<br\/><br\/>Answer : B<br\/><br\/><strong>Explanation:<br\/><\/strong>Assume that the filling capacity of the pump = x m3\/min<br\/>Given condition : Emptying capacity of the tank is 10 m3 per minute higher than its filling capacity. This means that the emptying capacity of the pump is = x + 10 m3\/min<br\/><br\/>We need to filling the capacity of pump from the given relation of filling &amp; emptying capacities. Hence, we can write that,<br\/>1200 \/ x - 1200\/ x+ 10 = 4<br\/><br\/>[1\/x \u2013 1\/ x+10] = 1\/300<br\/>By solving the above equation, we get the simplified form of quadratic equation.<br\/>So, x2 + 10x -3000 = 0<br\/>(x + 60) (x-50) = 0<br\/><br\/>Therefore, we get two values of 'x'; i.e. x = -60 &amp; x =50<br\/><br\/>Since we are asked to find the filling capacity, which is always positive; we will neglect the negative value of x = \u201360.<br\/>Therefore, the filling capacity of the pump = 50 m3\/min.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703157457207","position":15,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703157457207","name":"Q 15. An electric pump can fill a tank in 4 hours. Due to leakage in the tank, it took 4(1\/2) hrs to fill the tank. If the tank is full, how much time will the leak take to empty the full tank?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"8 hrs<br\/>16 hrs<br\/>21 hrs<br\/>36 hrs<br\/><br\/>Answer: D<br\/><br\/><strong>Explanation:<\/strong><br\/>Consider a pipe fills the tank in 'x' hrs. If there is a leakage in the bottom, the tank is filled in 'y' hrs.<br\/>The time taken by the leak to empty the full tank =<br\/>xyhrs \/ y \u2013 x<br\/>","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703157458251","position":16,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703157458251","name":"Q16. Two pipes fills a cistern in 15 hrs and 20 hrs respectively. The pipes are opened simultaneously and it is observed that it took 26 min more to fill the cistern because of leakage at the bottom. If the cistern is full, then in what time will the leak empty it?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"35 hrs<br\/>70 hrs<br\/>180 hrs<br\/>300 hrs<br\/><br\/>The time taken by the leak to empty the full tank =<br\/>xy hrs \/ y \u2013 x<br\/><br\/>Time taken to empty the tank by the leak = 4 x (9\/2) \/ (9\/2 ) - 4 = (36\/2 ) \/ \u00bd = 18\/ \u00bd = 18 x 2 = 36 hrs<br\/><br\/>But, direct values of x &amp; y are not given. So, we need to find the work done by the two pipes in 1 hr = (1\/15) + (1\/20) = 7\/60<br\/>Hence, the time taken by these pipes to fill the tank = 60\/7 hrs = 8 .57 hrs = 8 hrs 34 min --------( by multiplying '0.57' hrs x 60 = 34 minutes)<br\/>Due to leakage, time taken = 8 hrs 34 min + 26 min = 8 hrs 60 min = 9 hrs ----------( because 60 min = 1 hr)<br\/>Thus, work done by (two pipes + leak) in 1 hr = 1\/9<br\/>Hence, work done by leak in 1 hr = work done by two pipes \u2013 1\/9<br\/>= 7 \/60 \u2013 1\/9 = 3\/ 540 = 1\/180<br\/>Therefore, leak will empty the full cistern in 180 hours.<br\/>","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703158895987","position":17,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703158895987","name":"Q17. If two pipes function simultaneously, the reservoir will be filled in 24 hrs. One pipe fills the reservoir 20 hours faster than the other. How many hours does it take for the second pipe to fill the reservoir?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"12 hrs<br\/>30 hrs<br\/>44 hrs<br\/>60 hrs<br\/><br\/>Answer: D<br\/><br\/><strong>Explanation:<br\/><\/strong>Assume that the reservoir is filled by first pipe in 'x' hours.<br\/>So, the reservoir is filled by second pipe in 'x + 20' hours.<br\/>Now, from these above conditions, we can form the equations as,<br\/><br\/>1\/x + 1\/ (x + 20) = 1\/24<br\/><br\/>[x + 20 + x] \/ [x(x + 20)] = 1\/24<br\/><br\/>x2 \u2013 28x \u2013 480 = 0<br\/><br\/>By solving this quadratic equation , we get the factors (x \u2013 40) (x+12) = 0<br\/>Hence, we get two values : x = 40 &amp; x = -6<br\/>Since filling of reservoir is positive work , we can neglect the negative value of 'x'.<br\/>Thus, x = 40<br\/><br\/>This means that the second pipe will take (x+ 20) hrs = 40 + 20 = 60 hrs to fill the reservoir.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703158897222","position":18,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703158897222","name":"Q18. Two pipes can fill a tank in 8 hrs &amp; 6 hrs respectively. If they are opened on alternate hours and if pipe A gets opened first, then in how many hours, the tank will be full?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"6 hrs<br\/>7 hrs<br\/>8 hrs<br\/>14 hrs<br\/><br\/>Answer: B<br\/><br\/><strong>Explanation:<br\/><\/strong>Pipe A's work in 1 hr = 1\/8<br\/>Pipe B's work in 1 hr = 1\/6<br\/><br\/>Pipes (A+B)'s work in first 2 hrs when they are opened alternately = 1\/8 + 1\/6 = 7 \/24<br\/><br\/>Now,<br\/><br\/>In 4 hrs they fill : 2 X (7\/24) = 7\/12<br\/>In 6 hrs they fill : 3 X (7\/24) = 7\/8<br\/><br\/>After 6 hrs, part left empty = \u215b<br\/><br\/>Now it is A's turn to open up.<br\/><br\/>In one hr it fills 1\/8 of the tank.<br\/><br\/>So, the tank will be full in = 6 hrs + 1 hr = 7 hrs","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703159448419","position":19,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703159448419","name":"Q19. It is observed that the pipe A can fill the tank in 15 hrs and the same tank is filled by pipe B in 20 hrs. The third pipe C can vacant the tank in 25 hrs. If all the pipes get opened initially and after 10 hrs, the pipe C is closed, then how long will it take to fill the tank?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"3 hrs<br\/>7 hrs<br\/>12 hrs<br\/>20 hrs<br\/><br\/>Answer: C<br\/><br\/><strong>Explanation:<br\/><\/strong>Assume that the tank will be full in '10 + x' hrs.<br\/><br\/>Part filled by pipe A in 1 hr = 1\/15<br\/>Part filled by pipe B in 1 hr = 1\/20<br\/>Part emptied by pipe C in 1 hr = 1\/ 25<br\/><br\/>(A+ B)'s part filled in 1 hr = 1\/15 + 1\/20 = 7 \/60<br\/><br\/>As Pipe C is closed after 10 hours, let us find the part of tank filled in 10 hrs.<br\/>Tank filled in 10 hrs = 10 (part filled by A in 1 hr + part filled by B in 1 hr\u2013 part emptied by C in 1 hr)<br\/>= 10 [1\/15 + 1\/20 \u2013 1\/25] = 23 \/30<br\/><br\/>Remaining part = 1 \u2013 part filled in 10 hours<br\/>= 1 \u2013 23\/30 = 7\/30<br\/><br\/>We know that,<br\/>Part filled by (A + B) in 1 hr : Total part filled<br\/><br\/>Remaining part : Time taken<br\/><br\/>So, we get the ratio as ,<br\/>7\/60 : 7\/30 :: 1 : x<br\/>So, the value of x = 2\/30 x 1 x 60\/7 = 2 hrs.<br\/>Hence, the tank will be full in x + 2 = 10 + 2 hrs = 12 hrs<br\/><br\/><br\/>","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703159450124","position":20,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703159450124","name":"Q20. Two pipes A &amp; B can fill a tank in 5 min &amp; 10 min respectively. Both the pipes are opened together but after 2 min, pipe A is turned off. What is the total time required to fill the tank?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"4 min<br\/>6 min<br\/>14 min<br\/>20 min<br\/><br\/>Answer: B<br\/><strong>Explanation:<br\/><\/strong>Assume the total time required = x + 2 min<br\/>Part filled by pipe A in 1min = 1\/5 &amp; part filled by B in 1 min = 1\/10<br\/>After 2 min, part filed by A &amp; B together = 2 [ 1\/5 + 1\/10] = 3\/5<br\/><br\/>Remaining part = 1 \u2013 3\/5 = 2\/5<br\/>Part filled by pipe B in 1 min = 1\/10<br\/><br\/>As pipe A is turned off after 2 minutes, we get the relation as,<br\/><br\/>Part filled by (A + B) in 1 hr : Total part filled<br\/><br\/>Remaining part : Time taken<br\/><br\/>1\/10 : 2\/5 :: 1: x<br\/>x = (2\/5) x 1 x 10 = 4 min<br\/>Tank will be full in ( 2 min + 4 min) = 6 min<br\/>","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703160199629","position":21,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703160199629","name":"How do you solve pipe problems in aptitude?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Read the question multiple times and try to answer the query with the application of simplest formulas and using common sense.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703160250711","position":22,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703160250711","name":"In which exam does Pipes and Cistern Questions come?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"There are various exams like bank exams, SSC, RRB, Insurance, Olympiads and others in which these types of questions actually comes in.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703160252110","position":23,"url":"https:\/\/leverageedu.com\/discover\/indian-exams\/exam-prep-pipes-and-cistern-questions\/#faq-question-1703160252110","name":"Is this tuff to solve these types of problems?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"No by using common sense and correct formulas you can easily solve these types of questions.","inLanguage":"en-US"},"inLanguage":"en-US"}]}},"acf":[],"_links":{"self":[{"href":"https:\/\/leverageedu.com\/discover\/wp-json\/wp\/v2\/posts\/801934","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/leverageedu.com\/discover\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/leverageedu.com\/discover\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/leverageedu.com\/discover\/wp-json\/wp\/v2\/users\/102"}],"replies":[{"embeddable":true,"href":"https:\/\/leverageedu.com\/discover\/wp-json\/wp\/v2\/comments?post=801934"}],"version-history":[{"count":0,"href":"https:\/\/leverageedu.com\/discover\/wp-json\/wp\/v2\/posts\/801934\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/leverageedu.com\/discover\/wp-json\/wp\/v2\/media\/847751"}],"wp:attachment":[{"href":"https:\/\/leverageedu.com\/discover\/wp-json\/wp\/v2\/media?parent=801934"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/leverageedu.com\/discover\/wp-json\/wp\/v2\/categories?post=801934"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/leverageedu.com\/discover\/wp-json\/wp\/v2\/tags?post=801934"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}