15 men can do a piece of work in 36 hours. How many men will be required to finish the work in 20 hours?
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36 hours is required to finish a work by 15 men
1 " " " " " " " " 15/36 men
20 " " " " " " " " (15/36)×20 "
=8.3 men
1 " " " " " " " " 15/36 men
20 " " " " " " " " (15/36)×20 "
=8.3 men
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