Pipes and Cisterns mcqs test 01 1. Three taps A, B and C can fill a tank in 12, 15 and 20 hours respectively. If A is open all the time and B and are open for one hour each alternately, the tank will be full in: 7 hours 5 hours 3 hours 10 hours 2. Two pipes A and B can fill a tank in 6 hours and 4 hours respectively. If they are opened on alternate hours and if pipe A is opened first, in how many hours, the tank shall be full? 11 7 16 5 3. Pipe A can fill a tank in 5 hours, Pipe B in 10 hours and Pipe C in 30 hours. lf all the pipes are open, in how many hours will the tank be filled? 3 5 4 2 4. A large tanker can be filled by two pipes A and B in 60 minutes respectively, while a third pipe C can empty the full tank in 6 minutes. A and B are kept open for 5 minutes in the beginning and then C is also opened. In what time is the cistern emptied? 58 minutes 55 minutes 50 minutes 45 minutes 5. Two pipes A and B can fill a tank in 15 hours and 20 hours respectively. While a third pipe C can empty the full tank in 25 hours. All the three pipes are opened in the beginning. After 10 hours, C is closed. In how much time, will the tank be filled? 15 hours 8 hours 12 hours 18 hours 6. 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? 7 hours 3 hours 45 minutes 4 hours 5 hours 7. An electric pump can fill a tank in 3,hours, Because of a leak in the tank, it took 3.5 hours to fill the tank. If the tank is full, how much time will the leak take to empty it? 21 hours 15 hours 24 hours 28 hours 8. Two pipes A and B can fl a tank in 36 hours and 45 hours respectively. If both the pipes are opened simultaneously, how much time will be taken tò fill the tank? 20 hours 27 hours 25 hours 22 hours 9. 12 buckets of water fill a tank when the capacity of each bucket is 13.5 liters. How many buckets will be needed to fill the same tank, if the capacity of each bucket is 9 liters? 22 18 13 10 10. Two pipes A and B can separately fill a cistern in 60 minutes and 75 minutes 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 minutes. In how much time, the third pipe alone can empty the cistern: 18 hours 16 hours 20 hours 14 hours 11. Two taps A and B can fill a tank in 5 hours and 20 hours respectively. If both the taps are open then due to a leakage, it took 30 minutes more to fill the tank. If the tank is full, how long will t take for the leakage alone to empty the tank: 37 hours 40 hours 36 hours 30 hours 12. Two pipes A and B can fill a cistern in 37.5 minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if the pipe B is turned off after: 12 minutes 18 minutes 9 minutes 16 minutes 13. Two pipes A and B can fill a tank in 20 and 30 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank? 8 min 12 min 15 min 10 min 14. Bucket P has thrice the capacity as bucket Q. It takes 60 turns for bucket P to fill the empty drum. How many turns it will take for both the buckets P and Q, having each turn together to fill the empty drum? 45 30 35 40 15. A cistern has two taps which fill it in 12 minutes and 15 minutes respectively. There is also a waste Pipe in the cistern. When all the three are opened, the empty cistern is full in 20 minutes. How long will the waste pipe take to empty the full cistern? 15 minutes 10 minutes 5 minutes 18 minutes 16. A cistern can be filled by a tap in 4 hours while it can be emptied by another tap in 9 hours. If both the taps are opened simultaneously, then after how much time will the cistern get filled? 9.2 hours 10 hours 10.5 hours 7,2 hours 17. Pipes A and B can fill a tank in 5 and 6 hours respectively. Pipe C can empty it in 12 hours. If all the three pipes are opened together, then the tank will be filled in: 2.5 hours 1.5 hours 5 hours 3 9/17 hours 18. One pipe can fill a tank three times as fast as another pipe. If together the two pipes can fill the tank in 36 minutes, then the slower pipe alone ill be able to fill the tank in? 40 hours 25 hours 20 hours 35 hours 19. Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute, AIl the three pipes working together can fell the tank in 15 minutes. The capacity of the tank is: 80 gallons 120 gallons 135 gallons 100 gallons Loading …