A and B can do a job together in 25 days. After 15 days of working together. B leaves. A completes the remaining part of the job in 20 days, how long would each take to complete the job. working separately?
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A & B together work for 15 days completing 15/25 x 100 = 60% work. Remaining 40% work completed by A in 20 days. => A can complete full work alone in 20/40 x 100 = 50 days.
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