A and B together can complete a work in 30 days and B alone can do it in 60 days. Find in how many days A alone can do the work.
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Step-by-step explanation:
A and B together can complete the work in 30 days. This means that in 1 day, both A and B will complete 1/30th work. B alone can do it in 60 days. This means that in 1 day, B can do 1/60th work.
A's 1 day work = 1/30 - 1/60 = 1/60. Hence, A can complete the work alone in 60 days.
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