SOLUTION: One roofing crew of 5 can finish A 3,800-foot roof in 15 hours, ans another crew of 6 can do the same job in 12 hours. If they work together, how long will it take them to finish t
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Question 830114: One roofing crew of 5 can finish A 3,800-foot roof in 15 hours, ans another crew of 6 can do the same job in 12 hours. If they work together, how long will it take them to finish the job?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
1/15+1/12=1/x
4/60+5/60=1/x
9/60=1/x
x=60/9=20/3 =6 2/3
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