A pump can fill a tank with water in 2 hours. Because of a leak, it took 2 1/3 hours to fill the tank. The leak can drain all the water of the tank in? Choose the correct choice from the following
A) 17 hr  B) 19 hr  C) 10 hr  D) 14 hr  E) 16 hr

Rationale: "work done by the tank in 1 hour = ( 1 / 2 - 1 / 3 ) = 1 / 14 leak will empty the tank in 14 hrs . answer : d"
Answer: D