Question
A and B together can complete a work in 12 days, and B
alone can complete it in 20 days. How many days will A take to complete the work alone?Solution
Work done by A and B in one day = 1/12. Work done by B alone in one day = 1/20. Work done by A alone in one day = 1/12 - 1/20 = (5 - 3) / 60 = 2/60 = 1/30. A will take 30 days to complete the work alone. Correct Option: c
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