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A and B together can do a piece of work in 40 days. A having worked for 20 days, B finishes the remaining work alone in 60 days shall B finish the whole work alone?

A and B together can do a piece of work in 40 days. A having worked for 20 days, B finishes the remaining work alone in 60 days shall B finish the whole work alone? Correct Answer 80 days

Let's A's 1 day's work = x and B 's 1 days work = Y Then x + y = 1/40 and 20x + 60y = 1 By solving these equation B alone can do in 80 days

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