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A can do as much work in 3 days as B can...

A can do as much work in 3 days as B can do in s days and B can do as much work in 2 days as C can do in 3 days. All of them together can do a certain piece of work in 20 days. The no. of days A alone take to do the work will be a. 60 days b, 40 days c, 65 days d. 50 days

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