Question

A and B can together do a piece of work in 35 days while A alone can do it in 60 days.how long would B alone take do it ?

Answer 1

part of work done by A and b together = 1/35
Part of work done by A=1/60
part of work done by B= 1/35 -1/60
=(12-7)/420= 5/420 = 1/84
B can do work alone in 84 days.
Hope it helped ☺