SOLUTION: The OfficeJet printer can copy Maria's dissertation in 12 min. The LaserJet printer can copy the same document in 8 min. If the two machines work together, how long would they take

Algebra ->  Customizable Word Problem Solvers  -> Misc -> SOLUTION: The OfficeJet printer can copy Maria's dissertation in 12 min. The LaserJet printer can copy the same document in 8 min. If the two machines work together, how long would they take      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1032117: The OfficeJet printer can copy Maria's dissertation in 12 min. The LaserJet printer can copy the same document in 8 min. If the two machines work together, how long would they take to copy the dissertation?
Answer by jorel555(1290) About Me  (Show Source):
You can put this solution on YOUR website!
If the OfficeJet printer does its' job in 12 min., then it does 1/12 job per minute. The Laser jet does 1/8 jobs per minute. Therefore, adding them together, we get:
1/8 + 1/12=1/n
3/24 + 2/24=1/n
5/24=1/n
5n=24
n=24/5 minutes working together!!!!!!