SOLUTION: Susan can paint a room in 6 hours. John can paint the same room in 9 hours. How much time will it take for them to paint the room working together?

SOLUTION: Susan can paint a room in 6 hours. John can paint the same room in 9 hours. How much time will it take for them to paint the room working together?

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Question 264556: Susan can paint a room in 6 hours. John can paint the same room in 9 hours. How much time will it take for them to paint the room working together?
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
6*9/(6+9)=54/15=3.6 HOURS WHEN THEY WORK TOGETHER.
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