document.write( "Question 1098651: Please help me solve this.\r
\n" ); document.write( "\n" ); document.write( "A tank can be filled by a pipe in 3.0 h and emptied by another pipe in 4.0 h. How much time will be required to fill an empty tank if both are running?
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Algebra.Com's Answer #713021 by josgarithmetic(39620)\"\" \"About 
You can put this solution on YOUR website!
Fill Rate, \"1%2F3-1%2F4=4%2F12-3%2F12=1%2F12\", which means ONE tank's worth filled in TWELVE hours. \n" ); document.write( "
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