SOLUTION: Bea and Yan can do a certain job in 3 hours. On a given day, they worked together for 1 hour then Yan left and Bea finishes the rest of the work in 8 more hours. How long will it t

Question 982513: Bea and Yan can do a certain job in 3 hours. On a given day, they worked together for 1 hour then Yan left and Bea finishes the rest of the work in 8 more hours. How long will it take for Bea to do the job alone?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
What fraction of the job can they do
working together for 1 hr?
Let = that fraction
Their rate working together is:
[ 1 job ] / [ 3 hrs ]
---------------------

That means there is of the
job left to do after hr
---------------------------------
Let = Bea's rate of working in jobs/hr

This says that Bea can finish 1 job in 12 hrs working alone
check:

OK
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