A and B together can complete a work in 8 days. B alone complete that work in 12 days. B worked alone for 4 days. How many days A will take to complete the rest work after that?
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A alone can complete a work in 12 days. A and B together can complete it in 8 days. How long will B alone take to complete the work? ∴ B alone can do the work in 24 days.
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