document.write( "Question 627584: Oil us poured into a large, empty tank at the rate of 500 gallons per minute. At the same time, oil is leaking out at a rate of 300 gallons per minute. If it takes 1 hour to fill, how many gallons can the tank hold? \n" ); document.write( "
Algebra.Com's Answer #399074 by richwmiller(17219)\"\" \"About 
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every minute there is a net gain of 200 gallons.
\n" ); document.write( "60*200=6*2000=12000 gallons
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