**Home > Quantitative Aptitude > Time and Work > Pipes and Cistern**

6. Two pipes A and B can separately fill a tank in 10 and 15 minutes respectively. A third pipe C can drain off 30 liters of water per minute. If all the pipes are opened, the tank can be filled in 10 minutes. What is the capacity of the tank?

7. A pipe can fill a tank in 5 hours, but due to a leakage it took 7 hours to fill the tank. If the tank is full, in what time will tank become empty due to leakage?

8. A cistern can be filled by a tap in 4 hours while it can be emptied another tab in 7 hours. If both the taps are opened simultaneously, then after how much time will the cistern get filled?

9. A tap can fill a tank completely in 6 hours. After half the tank is filled, one more similar tap is opened. What is the total time taken to fill the tank completely?

10. Two pipes A and B can fill a tank in 4 hours and 5 hours respectively. if they are opened an alternate hours and if pipe B is opened first, in how many hours, the tank fill in