SOLUTION: It takes Stan three hours to mow the lawn and it takes Roger two hours. How long would it take them if they worked together?
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Question 335808: It takes Stan three hours to mow the lawn and it takes Roger two hours. How long would it take them if they worked together? Answer by mananth(16949) (Show Source):
You can put this solution on YOUR website! Stan 3 hours
so 1/3 of job he does in 1 hour.
Roger takes 2 hours
so he does 1/2 job in 1 hour.
..
together they do 1/3 + 1/2 job in 1 hour
=5/6 of the job in 1 hour.
so they will ake 6/5 hours to do the job.
1.2 hours
=1 hour 12 minutes
