Question

A is thrice as good a workman as b and takes 10 days less to do a piece of work than b takes. the number of days taken by b to finish the work is

Answer 1

Ratio of times taken by A and B = 1:3
Means B will take 3 times which A will do in 1 time

If difference of time is 2 days, B takes 3 days
If difference of time is 10 days, B takes (3/2) * 10 =15 days