SOLUTION: "It takes Mandy 4 hours to panel a room, while it would take Omar 5 hours to panel the same room. How long would it take them to panel the room if they worked together?" How would

Question 508547: "It takes Mandy 4 hours to panel a room, while it would take Omar 5 hours to panel the same room. How long would it take them to panel the room if they worked together?" How would I set this problem up, in an algebraic way, so that I can solve it?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
It takes Mandy 4 hours to panel a room, while it would take Omar 5 hours to panel the same room. How long would it take them to panel the room if they worked together?" How would I set this problem up, in an algebraic way, so that I can solve it?
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Mandy does 1/4 room per hour.
Omar does 1/5 per hour.
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Together, they do 1/4 + 1/5 per hour = 9/20 room/hr
--> 20/9 hours per room

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