PIPES AND CISTERNS Q & A

1. Two taps A and B can fill a tank in 10 hours and 15 hours and 15 hours respectively. If both the taps are opened together, the tank will be full in ?
Ans:6hrs

2. To fill a cistern, pipes A,B and C take 20 minutes, 15 minute and 12 minutes resp. The time in minutes that the three pipes together will take to fill the cistern is
 Ans:5

3. Two pipes can fill a tank in 10 hours and 12 hours resp. while third pipe empties the full tank in 20 hours. If all the three pipes operate simultaneously, in how much time the tank will be filled?
Ans;7 hrs 30 mins

4. A cistern can be filled in 9 hours but it takes 10 hours due to a leak in its bottom. If the cistern is full, then the time that the leak will take to empty it is?
Ans:90 hrs

5. An electric pump can fill a tank in 3 hours. Because of a leak in the tank, it took 3 ½ hours to fill the tank. The leak can drain out of all the water of the tank in
Ans:21 hrs

6. Taps A and B can fill a bucket in 12 minutes and 15 minutes resp. If both are opened and A is closed after 3 minutes. How much further time would it take for B to fill the bucket?
Ans 8 min 15 sec