SOLUTION: Tommy can paint a fence in 6 hours. If his friend Huck helps, they can paint the fence in 1 hour. How fast could Huck paint the fence by himself?
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Question 911194: Tommy can paint a fence in 6 hours. If his friend Huck helps, they can paint the fence in 1 hour. How fast could Huck paint the fence by himself? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! rate for A alone 6
rate for A & B together 1
1/a+1/b=1/x
1/6+1/b=1/1
1/b=1/1-1/6
1/b=6/6-1/6
1/b=5/6
1/b=1/1.2
b=1.2
rate for B alone 1.2
check
1/6+1/1.2=1/1
1.2/7.2+6/7.2=1/1
7.2/7.2=1/1
ok
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