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 choice from the following:
A) 10hr B) 14hr C) 12hr D) 9hr E) 15hr
Work done by the leak in 1 hour = 1/2 - 3/7 = 1/14   Leak will empty the tank in 14 hrs   Answer is 14hr
<result>B</result>
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 ?