Question

A, B and C together can do a piece of work in 15 days.B alone can do it in 30 days and C alone can do it in 40 days. In now many days will A alone do the work?​

Answer 1

ODW stands for One Day Work

ODW of A,B, C together = 1/15

ODW of B = 1/30

ODW of C = 1/40

ODW of A = 1/15 - 1/30 - 1/45

= 1/90

So, A alone will do work in 90 days.