A tap can fill a tank in 16 minutes and another can empty it in 8 minutes. If the tank is already half full and both the taps are opened together, the tank will be?

Filled in 12 min.
Emptied in 12 min.
Filled in 8 min.
Emptied in 8 min.

Correct Answer: Emptied in 8 min.

Explanation:

Part emptied in 1 min. = (1/8 - 1/16) = 1/16
∴ Time taken to empty the full tank = 16 min.
Hence, time taken to empty the half tank = 8 min.

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