First, determine the total amount of work needed to complete the job. This can be expressed in "man-days." The total work is the product of the number of men and the time it takes them to finish the work. Total Work=(Number of men)×(Number of days) Using the initial information: Total Work=15 men×20 days=300 man-days Now, use the total amount of work and the new number of men to find out how many days it will take them to complete the same job. Number of days=Total Work/Number of men Using the calculated total work and the new number of men: Number of days=300 man-days/25 men=12 days Answer: It will take 12 days for 25 men to finish the same work.
If 15 men can do a piece of work in 20 days. In how many days can 25 men finish the same work?
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