If A and B together can complete a piece of work in 15 days and B alone in 20 days, in how many days can A alone complete the work?

40 30 45 60

Your Answer

A+B one day work is 1/15 B one day work is 1/20 A alone can do it= (A+B)-B =1/15-1/20 =4-3/60 1/60 the work is 60 days A can complete

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