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Arithmetic Aptitude :: Pipes & Cistern

2. A pump can fill a tank with water in 2 hours. Because of a leak, it took hours to fill the tank. The leak can drain all the water of the tank in:

Answer: Option D

Explanation :

Work Done by the leak in 1 hrs = (1/2-3/7) = 1/14

so leak will empty the tank in 14 hrs.

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