Pre-Calc Question. Please Help?

canflippuck6

New member
I have spend the last 45 minutes or so on this question and cannot come up with the acceptable computer answer. Please help me out here.

A 310-gallon water storage tank is filled by a single inlet pipe, and two identical outlet pipes can be used to supply water to the surrounding fields (see the figure). It takes 5 hours to fill an empty tank when both outlet pipes are open. When one outlet pipe is closed, it takes 4 hours to fill the tank. Find the flow rates (in gallons per hours) in and out of the pipes.
 
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