document.write( "Question 85282: A tank can be emptied thru either of 2 pipes, the 1st pipe empties the tank in 4hours. The 2nd pipe empties in 3hours. how long will it take to emptythe tank using both pipes \n" ); document.write( "
Algebra.Com's Answer #61475 by Lacey020991(49)\"\" \"About 
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