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# Pipes & Cistern || 03.05.2021

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Question 1

Two inlet pipes can fill a cistern in 20 and 24 hours respectively and an outlet pipe can empty 160 gallon of water per hour. All the three pipes working together can fill the empty cistern in 40 hours. What is the capacity (in gallons) of the tank?

Question 2

Two pipes can fill a tank in 15 hours and 20 hours, respectively, while the third can empty it in 30 hours. If all the pipes are opened simultaneously, the empty tank will be filled in:

Question 3

Two pipes can fill a tank in 5 hours and 6 hours respectively and a waste pipe can empty it in 4 hours. In how much time will the tank be full, if all three pipes are opened together?

Question 4

Pipes A and B can fill a tank in 8 hours and 12 hours, respectively, whereas pipe C can empty the full tank in 6 hours. A and B are opened for 3 hours and then closed and C is opened instantly. C will empty the tank in:

Question 5

Three pipe A, B and C can fill a tank in 15, 24 and 36 min respectively. At the same time, pipe D can fill a tank in 1 hour. If all four pipes open together, then in how much time will the tank be filled?

Question 6

Two inlet pipes can fill a tank in 28 minutes and 35 minutes respectively. If an outlet pipe can drain the tank in 70 minutes. If all the three pipes are opened together, find the time taken by them to fill the tank.

Question 7

Pipe A can fill a tank in 4 hours and pipe B is also attached to the tank. Both pipes fill the tank in 2½ hours then find the time taken by pipe B to fill the tank alone.

Question 8

Three pipes P, Q and R can seperately fill a cistern in 4, 8 and 12 hrs respectively. Another pipe S can empty the completely filled tank in 10 hrs. Which of the following arrangments will fill the cistern in less time than others?

Question 9

Two pipes A and B can fill a tank in 45 minutes. If pipe A can fill an empty tank in 1 hour, how long will it take pipe B to fill the empty tank?

Question 10

Two pipes, P and Q can fill a cistern in 15 and 18 minutes respectively. If both are opened together and at the end of 3 minutes, Q is closed, how much longer will the cistern take to fill?
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