Question

A takes 10 days less than the time taken by B to finish a piece of work. If both A and B together can finish the work in 12 days, find the time taken by B to finish the work.

Answer 1

Let B takes x days to complete the work.

Therefore, A will take (x-10) days

Number of days to complete the work by 

B cannot be less than that by A; therefore, we get: x = 30 

Thus, B completes the work in 30 days.