A pump can fill a tank with water in 2 hours. Because of a leak, it took 2 hours to fill the tank. The leak can drain all the water of the tank in: Choices.
A) 14 hrs
B) 15 hrs
C) 10 hrs
D) 8 hrs
E) 9 hrs
work done by leak in 1 hr = (1/2-3/7)=1/4   =&gt;14 hrs   14 hrsNSWER 14 hrs
<result>A</result>
A pump can fill a tank with water in 2 hours. Because of a leak, it took 2 hours to fill the tank. The leak can drain all the water of the tank in: