Mathematics, 07.07.2020 02:01, andybiersack154

A and b can do a piece of work in 30 days while b and c can do the same work in 24 days and c and a in 20 days. If they all work together, in how many days will the work finish?

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A and b can do a piece of work in 30 days while b and c can do the same work in 24 days and c and a...