24 men working at 8 hours per day can do a piece of work in 15 days. In how many days can 20 men working at 9 hours per day can complete the same work?
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Answer:
The job takes 24 men x 8 hrs/day x 15 days = 2880 man-hours
Days Required = 2880 man-hours/(20 men x 9 hours/day) = 16 days
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