Question

Tap A can fill a tank in 8 minutes. Outlet B can empty the tank in 12 minutes. if both are kept open, how long it will take to fill the tank?

Answer 1

Part of the tank filled in 1 min = 1\8

Part of the tank emptied in 1 min = 1\12

When both the taps are opened simultaneously, part of cistern fill in 1 min = 1/8-1/12 = 1/24

Hence, the tank will be filled in 24 mins

Answer 2

Answer:

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