SOLUTION: It takes John 4 1/2 hours to complete a job alone, and it takes 2 hours for Laura to do the same job alone. How long would it take for them to complete the job working together?

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: It takes John 4 1/2 hours to complete a job alone, and it takes 2 hours for Laura to do the same job alone. How long would it take for them to complete the job working together?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 192057: It takes John 4 1/2 hours to complete a job alone, and it takes 2 hours for Laura to do the same job alone. How long would it take for them to complete the job working together?
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
john can do 2/9 of the job per hour
Laura can do 1/2 of the job per hour
:
together:
:
%281%2F2%2B2%2F9%29t=1
:
%289%2F18%2B4%2F18%29t=1
:
%2813%2F18%29t=1
:
t=18/13 of an hour