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A pipe can fill a cistern in 20 minutes ...

A pipe can fill a cistern in 20 minutes where as the cistern when full can be emptied by a leak in 28 minutes. When both are opened, The time taken to fill the cistern is:

A

48 min

B

70 min

C

80 min

D

60 min

Text Solution

Verified by Experts

The correct Answer is:
B
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