SOLUTION: It takes John 3 hours to paint a house. Chris 2 hours and William 8 1/2 hours. If all 3 work together how long will it take all 3 of them?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: It takes John 3 hours to paint a house. Chris 2 hours and William 8 1/2 hours. If all 3 work together how long will it take all 3 of them?      Log On