# Aptitude  Pipes  Practice Q&A

1. A cistern can be filled by a tap in 3 hours while it can be emptied by another tap in 8 hours. If both the taps are opened simultaneously, then after how much time will the cistern get filled?

 4.8 hr 2.4 hr 3.6 hr 1.8 hr

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2. Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank is:

 60 gallons 100 gallons 120 gallons 180 gallons

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3. A pump can fill a tank with water in 2 hours. Because of a leak, it took 2$\dfrac{1}{3}$ hours to fill the tank. The leak can drain all the water of the tank in:

 4$\dfrac{1}{3}$hours 7 hours 8 hours 14 hours

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4. Pipe A can fill a tank in 8 hours, pipe B in 4 hours and pipe C in 24 hours. If all the pipes are open, in how many hours will the tank be filled?

 2.4 hr 3 hr 4 hr 4.2 hr

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5. Pipes A and B can fill a tank in 8 and 24 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:

 18 hr 6 hr 24 hr 12 hr

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6. Two pipes A and B can fill a tank in 2 and 6 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?

 3 min 2.5 min 2 min 1.5 min

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7. A large tanker can be filled by two pipes A and B in 60 minutes 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?

 15 min 20 min 27.5 min 30 min

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8. 13 buckets of water fill a tank when the capacity of each bucket is 51 litres. How many buckets will be needed to fill the same tank, if the capacity of each bucket is 17 litres?

 33 29 39 42

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9. One pipe can fill a tank 6 times as fast as another pipe. If together the two pipes can fill the tank in 22 minutes, then the slower pipe alone will be able to fill the tank in:

 164 min 154 min 134 min 144 min

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10. A tank is filled in 5 hours by three pipes A, B and C. The pipe C is twice as fast as B and B is twice as fast as A. How much time will pipe A alone take to fill the tank?

 20 hours 25 hours 35 hours Cannot be determined

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