InterviewSolution
Saved Bookmarks
| 1. |
There are two pipes in a tank. Pipe A is for filling the tank and Pipe B is for emptying the tank. If A can fill the tank in 15 hours and B can empty the tank in 20 hours then find how many hours will it take to completely fill a half empty tank?1). 452). 403). 304). 35 |
|
Answer» ⇒ Work done by A in 1 hour = 1/15 ⇒ Work done by B in 1 hour = - 1/20 ⇒ Total work done by A and B in 1 hour = 1/15 + (- 1/20) = 1/15 – 1/20 = 1/60 ⇒ They will FILL the full tank in 60 HOURS ∴ HALF tank can be fill in 30 hours |
|