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?
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Question 469390: 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?
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
1/3+1/2+1/(17/2)=1/t
1/3+1/2+2/17=1/t
34t+51t+12t=102
97t=102
t=102/97 hours..
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