SOLUTION: Working alone, Carlos can oil the lanes in a bowling alley in five hours. Jenny can oil lanes in nine hours. If they worked together, how long would it take them?

Algebra ->  Rate-of-work-word-problems -> SOLUTION: Working alone, Carlos can oil the lanes in a bowling alley in five hours. Jenny can oil lanes in nine hours. If they worked together, how long would it take them?       Log On


   

Question 737582: Working alone, Carlos can oil the lanes in a bowling alley in five hours. Jenny can oil lanes in nine hours. If they worked together, how long would it take them?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
1/5+1/9=1/x
x = 45/14
x = 3.2143 hours together