SOLUTION: Barry can do a certain job in 9 hours, whereas it takes Samuel 11 hours to do the same job. How long would it take them to do the job working together?
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Question 899859: Barry can do a certain job in 9 hours, whereas it takes Samuel 11 hours to do the same job. How long would it take them to do the job working together? Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! Barry does 1/9 per hour.
Samuel does 1/11 per hour.
Together they do 1/9 + 1/11 per hour.
Add to get the job/hr
Invert to get hours/job
