SOLUTION: It takes Sue 3 hours to paint a room and it takes Joe 5 hours to paint the same room. If they work together how long will it take them to paint the room?

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Question 308392: It takes Sue 3 hours to paint a room and it takes Joe 5 hours to paint the same room. If they work together how long will it take them to paint the room?

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
1/3+1/5=1/x
(5+3)/3*5=1/x
8/15=1/x cross multiply.
8x=15
x=15/8
x=1.875 hours working together.