Question

A and B can do a piece of work in 8 days and A alone can do it in 12 days. In how many days can B alone do it?

• A. 16
• B. 12
• C. 15
• D. 24

Answer 1

Answer:

D. 24

total work = LCM( 8, 12) =24 efficency of A + B = 24/8 = 3 efficency of A = 24/12 = 2 efficency of B = 3 - 2 = 1 time taken by B to complete the work = 24/1= 24