document.write( "Question 60890: One pipe can fill a tank in 8 minutes and a second pipe can fill it in 12 minutes. If the tank is empty, how long will it take both pipes to fill it?\r
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Algebra.Com's Answer #41942 by checkley71(8403)\"\" \"About 
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TWODIFFERENT ITEMS WORKING TOGETHER TO ACCOMPLISH A TASK IS GIVEN BY
\n" ); document.write( "X*Y/(X+Y) THUS
\n" ); document.write( "8*12/(8+12)
\n" ); document.write( "96/20=4.8 MINUTES TO FILL THE TANK WHEN BOTH PIPES ARE USED
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