250 men can finish a work in 20 days working 5 hours a day. To finish the work within 10 days working 8 hours a day, the minimum number of men required is ______?
- 300
- 310
- 312
- 313
Explanation
Let's calculate the total work hours:
250 men * 20 days * 5 hours/day = 25,000 man-hours
To finish the work in 10 days working 8 hours a day:
Let x be the number of men required:
x men * 10 days * 8 hours/day = 25,000 man-hours (to complete the same amount of work)
x * 80 = 25,000
x = 25,000 / 80
x = 312.5 (313)
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