50.A and B together can complete a piece of work in 4 days. If A alone can complete the same work in 12 days. in how many days can b alone complete that work?
A. 1/3 days B. 1/6 days
C. 1/9 days D. 1/12 days
Answer:
(A+B)'s 1 day's work = 1/4
A's 1 day's work = 1/12
B's 1 day's work = (1/4 - 1/12)
= 1/6.
Hence, B alone can complete the work in 6 days.
