Question

10. 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 how many days will A alone do the work?​

Answer 1

Answer:

120 days

Explanation:

A,B,C together can do work in 15 days.

A+B+C's 1 day work =1/15

B's alone work=30days =1/30

C's alone work=40days =1/40

A's alone work=1/15-1/30+1/40

=1/120 =120 days