SOLUTION: Suppose one person can mow a lawn in x hours and a second person can mow the same lawn in y hours. How long will it take the two people to mow the lawn if they work together?
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Question 838343: Suppose one person can mow a lawn in x hours and a second person can mow the same lawn in y hours. How long will it take the two people to mow the lawn if they work together?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
1/x+1/y=1/z
where z is number of the hours needed working together
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