Question 434622: ryan can paint a fence in ten hours. asanji can paint the same fence in eight hours. if they worked together how long would it take them. Answer by nerdybill(7384) (Show Source):
You can put this solution on YOUR website! ryan can paint a fence in ten hours. asanji can paint the same fence in eight hours. if they worked together how long would it take them.
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Let x = time (hours) it takes for both
then
x(1/10 + 1/8) = 1
multiplying both sides by 80:
x(8 + 10) = 80
18x = 80
x = 80/18
x = 4.44 hours
or
x = 4 hours and 27 minutes
