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 in ?
Choose the correct option.
A) 10 hr	B) 14 hr	C) 12 hr	D) 9 hr	E) 15 hr

Rationale: "work done by the leak in 1 hour = 1 / 2 - 3 / 7 = 1 / 14 leak will empty the tank in 14 hrs answer is b"
Answer: B