SOLUTION: Working alone, Dan can sweep a porch in 15 minutes. Alberto can sweep the same porch in 11 minutes. If they worked together how long would it take them?

SOLUTION: Working alone, Dan can sweep a porch in 15 minutes. Alberto can sweep the same porch in 11 minutes. If they worked together how long would it take them?

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Question 737586: Working alone, Dan can sweep a porch in 15 minutes. Alberto can sweep the same porch in 11 minutes. If they worked together how long would it take them?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
1/15+1/11=1/x
x = 165/26
x = 6.3462 minutes
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