SOLUTION: If it takes 10 men 4 hours to repair a barn, how long will it take 8 men to complete the task?

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Question 724707: If it takes 10 men 4 hours to repair a barn, how long will it take 8 men to complete the task?
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


10 men take 4 hours to repair 1 barn, so 10 men take 1 hour to repair 1/4 of a barn, so 1 man takes 1 hour to repair 1/40 of a barn, so 8 men take 1 hour to repair 8/40 = 1/5 of a barn, so 8 men repair a whole barn in 5 hours. Which makes sense: a 20% reduction in resources translates to a 20% increase in time to complete.

John

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