SOLUTION: Bob can paint a room in 3 hours working alone. It takes Barbara 5 hours to paint the same room. How long would it take them to paint the room together?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: Bob can paint a room in 3 hours working alone. It takes Barbara 5 hours to paint the same room. How long would it take them to paint the room together?      Log On


   

Question 1008205: Bob can paint a room in 3 hours working alone. It takes Barbara 5 hours to paint the same room. How long would it take them to paint the room together?
Answer by ikleyn(52786) About Me  (Show Source):
You can put this solution on YOUR website!
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1%2F3 + 1%2F5 = 5%2F15+%2B+3%2F15 = 8%2F15.

It will take 15%2F8 hour for Bob and Barbara to paint the room working together.

For details see the lesson Using fractions to solve word problems on joint work in this site,
where you will find a bunch of typical solved problems on joint work.