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Two pipes A and B can separately fill a ...

Two pipes A and B can separately fill a cistern in 60 minutes and 75 minutes respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes are simultaneously opened then the cistern is full in 50 minutes. In how much time, the third pipe alone can empty the cistern? `90\ m in` b. `100\ m in` c. `110\ m in` d. `120\ m in`

A

110 minutes

B

100 minutes

C

120 minutes

D

90 minutes

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Two pipes A and B can separately fill a cistem in 60 minutes and 75 minutes respectively. There is a third pipe in the bottom of the cistern to empty it. If all the three pipes are simultaneously opened, then the cistern is full in 50 min utes. In how much time the third pipe alone can empty the stern?

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