SOLUTION: bill caN paint a house himself in 8 hours. Ross can do the same job in 12 hours. If Ross starts painting at 8 am and Bill joins him at 10 am, then what time will they have the hous

Algebra ->  Rate-of-work-word-problems -> SOLUTION: bill caN paint a house himself in 8 hours. Ross can do the same job in 12 hours. If Ross starts painting at 8 am and Bill joins him at 10 am, then what time will they have the hous      Log On


   

Question 991240: bill caN paint a house himself in 8 hours. Ross can do the same job in 12 hours. If Ross starts painting at 8 am and Bill joins him at 10 am, then what time will they have the house painted?
Answer by josgarithmetic(39631) About Me  (Show Source):
You can put this solution on YOUR website!
Uniform Rates situation according to rule RT=J relating rate, time, amount of job. The example's rate is in unit of HOUSE per HOUR.

Ross was working for two hours when Bill joined him.

t, how much time they both work together to finish after Ross worked alone.
%281%2F12%29%2A2%2B%281%2F12%2B1%2F8%29%2At=1

1%2F6%2B%28%282%2B3%29%2F24%29t=1

1%2F6%2B%285%2F24%29t=1
4%2B5t=24

5t=20

highlight%28t=4%29 How Many Hours After 10AM; which means 2:00PM.