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

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> 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       Log On


   

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) About Me  (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