SOLUTION: Ryan can paint a fence in 10 hours. Assanji can paint a fence in 8 hours. how long will it take them to paint it if they work together?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: Ryan can paint a fence in 10 hours. Assanji can paint a fence in 8 hours. how long will it take them to paint it if they work together?      Log On


   

Question 655932: Ryan can paint a fence in 10 hours. Assanji can paint a fence in 8 hours. how long will it take them to paint it if they work together?
Answer by kevwill(135) About Me  (Show Source):
You can put this solution on YOUR website!
Ryan can paint a fence in 10 hours, so he can paint 1%2F10 of the fence in one hour.
Assanji can paint a fence in 8 hours, so he can paint 1%2F8 of the fence in one hour.
Together they can paint 1%2F10+%2B+1%2F8+=+4%2F40+%2B+5%2F40+=+9%2F40 fence in an hour.
So it will take them 1%2F%289%2F40%29+=+40%2F9+=+4%264%2F9 hours, or 4 hours, 26 minutes, 40 seconds to paint the fence.