# Solution: In how many days can all of them do the work together?

A and B can do a piece of work in 42 days, B and C in 31 days and C and A in 20 days. In how many days can all of them do the work together? How to solve work problems?

#### Problem Statement: EE Board April 1996

Ron and Rej can do a piece of work in 42 days, Rej and Loyd in 31 days and Loyd and Ron in 20 days. In how many days can all of them do the work together?

If all of them work together, they would take 19 days to finish the work.

Solution:

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