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Time & Work
Time, Distance and Speed

If 5 men can complete a piece of work in 20 days, how many days will it take for 10 men to complete the same work?

Answer: A. 10 days
If 5 men take 20 days, the total work is 5 * 20 = 100 man-days. Therefore, 10 men will take 100/10 = 10 days.
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