If pipes A and B can fill a tank in 36 hours and 48 hours respectively. Both pipes are opened together for 9 hours and then A is closed. Pipe B alone will fill the remaining part of the tank now in? |
20\(\frac{1}{2}\) hours 25 hours 24 hours 27 hours |
27 hours |
(A + B) fill the tank in 9 hours = 7 × 9 = 63 Remaining = 144 - 63 = 81 B will fill remaining tank in = \(\frac{81}{3}\) = 27 hours |