document.write( "Question 509849: a tank be fulled by one pipe in 30 minutes emtied by onother in 50 minutes. if both pipes are open, how long will it take to full tank.\r
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Algebra.Com's Answer #341632 by Alan3354(69443)\"\" \"About 
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1/30 of the tank flows in per minute.
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\n" ); document.write( "Each minute, 1/30 - 1/50 of the tank's volume is filled.
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