document.write( "Question 742195: One pipe can fill a tank in 20 minutes, while
\n" ); document.write( "another takes 30 minutes to fill the same tank. How long would it take the two pipes together to fill the tank?
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Algebra.Com's Answer #852659 by ikleyn(53570) $\"\"$ $\"About$

You can put this solution on YOUR website!
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document.write( "First  pipe fills 1/20 of the tank volume per minute when works alone.\r\n" );
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document.write( "Second pipe fills 1/30 of the tank volume per minute when works alone.\r\n" );
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document.write( "Working together, both pipes fill  \r\n" );
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document.write( "     +  =  +  =  =  \r\n" );
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document.write( "of the tank volume per minute.\r\n" );
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document.write( "Hence, it will take 12 minutes for both pipes to fill the tank.    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "The answer in the post by @lynnlo is incorrect.\r
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