SOLUTION: Randy can finish a certain job in 8 hours. Jerry can finish the same job in 10 hours, and John can finish the same in 7 hours. how long will they finish if they work together?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: Randy can finish a certain job in 8 hours. Jerry can finish the same job in 10 hours, and John can finish the same in 7 hours. how long will they finish if they work together?      Log On


   

Question 450060: Randy can finish a certain job in 8 hours. Jerry can finish the same job in 10 hours, and John can finish the same in 7 hours. how long will they finish if they work together?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
x/8+x/10+x/7=1
x=280/103=2.72 hours