Pipes and Cistern - Questions and Answers

1. A cistern can be filled by two pipes A and B in 4 hours and 6 hours respectively. When full, the tank can be emptied by a third pipe C in 8 hours. If all the taps be turned on at the same time, the cistern will be full in:

2. A pipe can fill a tank in x hours and another can empty it in y hours. They can together fill it in (y>x):

3. A cistern is normally filled in 8 hours but takes two hours longer to fill because of a leak in it sbottom. If the cistern is full, the leak will empty it in:

4. Pipes A and B can fill a tank in 10 hours and 15 hours respectively. Both together can fill it in:

5. Two pipes X and Y can fill a cistern in 24 min and 32 min respectively. If both the pipes are opened together, then after how much time Y should be closed so that the tank is full in 18 minutes>