A and B together can do a piece of work in 10 days. If A alone will take 12 days to finish the work, will B take to finish the work?
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Answer:
A and B = 10 days
in one day A and B can do job = 1/10
A alone =12 days
A can do work alone in 1 day = 1/12
B alone can do work in = 1/10-1/12
= 6-5/60
= 1/60
:: B alone can do work in 60 days
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