SOLUTION: working together, it takes two roofers 4 hours to put a new roof on a portable classroom. if the first roofer can do the job by himself in 6 hours, how many hours will it take the

SOLUTION: working together, it takes two roofers 4 hours to put a new roof on a portable classroom. if the first roofer can do the job by himself in 6 hours, how many hours will it take the

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Question 498129: working together, it takes two roofers 4 hours to put a new roof on a portable classroom. if the first roofer can do the job by himself in 6 hours, how many hours will it take the second roofer to do the job by himself?
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
1st roofer does 2/3 of the job (4/6), which means the 2nd roofer does 1/3 of the job in 4 hr
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