Question

There are two pipes in a tank. If pipes A an B is opened together the tank will be filled in 8 minutes. If pipe A a alone is opened the tank will be filled in 12 minutes if pipe B alone is opened the tank will be filled in how many minutes ?

• A. 10 minutes
• B. 24 minutes
• C. 16 minutes
• D. 20 minutes

Answer 1

Answer:

B. 24 minutes

Total capacity of tank = LCM[8, 12] = 24 Efficiency of A + B= 24/8 = 3 Efficiency of A = 24/12 = 2 Efficiency of B = 3 - 2 = 1 Time taken by B to fill the tank = 24/1 = 24 minute