SOLUTION: If John can shingle a roof alone in 7 hours and Stuart can shingle a roof alone in 3 hours, how long will it take to shingle the roof if John and Stuart work together? Round your a

Algebra ->  Rate-of-work-word-problems -> SOLUTION: If John can shingle a roof alone in 7 hours and Stuart can shingle a roof alone in 3 hours, how long will it take to shingle the roof if John and Stuart work together? Round your a      Log On


   



Question 737434: If John can shingle a roof alone in 7 hours and Stuart can shingle a roof alone in 3 hours, how long will it take to shingle the roof if John and Stuart work together? Round your answer to the nearest hundredth.

Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
1/3+1/7=1/x
x=21/10