SOLUTION: If John takes 4 hours to build a tree house and if Kevin takes 5 hours to build a tree house, what part of the job is done if they work together for 1 hour?

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Question 824544: If John takes 4 hours to build a tree house and if Kevin takes 5 hours to build a tree house, what part of the job is done if they work together for 1 hour?
Answer by Alan3354(69443)   (Show Source): You can put this solution on YOUR website!
If John takes 4 hours to build a tree house and if Kevin takes 5 hours to build a tree house, what part of the job is done if they work together for 1 hour?
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In an hour, John does 1/4 and Kevin does 1/5.
Add those.

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