Thread: word problem
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Shmads
 
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I hand out detentions.
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Default 01-09-2008
These tend to be tricky! But pretty easy once you get the hang of it.

Antonio--1/5 of the job in one hour
Brian---1/9th of the job in one hour.

Together-- 1/5 + 1/9= 9/45 + 5/45
=14/45 of the job per hour

So--about 3.21 hours.
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