Question

A and B can do a piece of work in 72 days. B and C can do it in 120 days. a and c can do it in 90 days. in what time can a alone do it​

Answer 1

Answer:

42

Explanation:

As C n B can do work in 120 days

C can do work in 90 days

so B can do work in 30 days

B n A do work in 72 days

so A can do work in 42 days

Answer 2

Answer:

How many days can A alone do the same work? ... A and B can do a piece of work in 30 days, while B and C can do the same work 24 ...