document.write( "Question 354673: Hello,\r
\n" ); document.write( "\n" ); document.write( "One pipe can fill a tank in 2 h, a second pipe can fill the tank in 4 h, and a third pipe can fill the tank in 5 h. How long will it take to fill the tank with all three pipes working? \r
\n" ); document.write( "\n" ); document.write( "Okay, so this is how I thought it might look like:
\n" ); document.write( "1/2 + 1/4 + 1/5 = 3\r
\n" ); document.write( "\n" ); document.write( "Then I multiplied all of them by the LCM 20. However, when I was done my answer came out to be 60/19 and that just does not seem right to me. Hope you can help me with this problem! Thank you for your time = )
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Algebra.Com's Answer #253447 by scott8148(6628)\"\" \"About 
You can put this solution on YOUR website!
you're kind of on the right track\r
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\n" ); document.write( "\n" ); document.write( "each pipe fills some FRACTION of the pool based on the individual times
\n" ); document.write( "___ the fractions sum to one ,the WHOLE pool\r
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\n" ); document.write( "\n" ); document.write( "x = combined time\r
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\n" ); document.write( "\n" ); document.write( "(x / 2) + (x / 4) + (x / 5) = 1
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