SOLUTION: If bob can mow a lawn in 5 hours, and jim can mow the same lawn in 3 hours,how long will it take if they work together?
Algebra ->
Rate-of-work-word-problems
-> SOLUTION: If bob can mow a lawn in 5 hours, and jim can mow the same lawn in 3 hours,how long will it take if they work together?
Log On
Question 350001: If bob can mow a lawn in 5 hours, and jim can mow the same lawn in 3 hours,how long will it take if they work together? Answer by mananth(16946) (Show Source):
You can put this solution on YOUR website! Bob can do the job in 5 hours
so he does 1/5 of the job in 1 hour.
..
Jim does in 3 hours.
he does 1/3 of the job in 1 hour.
Together they do 1/3 + 1/5 of the job in 1 hour
=8/15 of the job.
so they will take 15/8 hours to do the job together.
1.87 hours
