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July 1, 2015

Homework Help: Algebra I

Posted by Meredith on Wednesday, June 30, 2010 at 5:59pm.

Pump A, working alone, can fill a tank in 3 hours, and pump B can fill the same tank in 2 hrs. If the tank is empty to start and pump A is switched on for one hour, after which pump B is also switched on and the two work together, how many minutes will pump B have been working by the time the pool is filled?

a)48
b)50
c)54
d)60
e)64

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