Question

There are three pipes A, B, C in a tank. If all the three pipes are open together the tank will be filled in 9 minutes. A and C are open together the tank will be fill in 12 minutes if B alone is open the tank will be filled in how many minutes ?

• A. 36 minutes
• B. 18 minutes
• C. 27 minutes
• D. 45 minutes

Answer 1

Answer:

A. 36 minutes

Total capacity of tank = LCM[9, 12] =36 Efficiency of A , B , C= 36/9 = 4 Efficiency of A and C = 36/12 = 3 Efficiency of B = 4 - 3 = 1 Time taken by B to fill the tank = 36/1 = 36 minutes