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?
A16
B12
C15
D24
Answer:
D. 24
Explanation:
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