document.write( "Question 108455: Construction: Concrete weighs 150 lb/cu ft. \r
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Algebra.Com's Answer #79100 by waiwai933(6)\"\" \"About 
You can put this solution on YOUR website!
\"18%2A4.5%2A%282%2F3%29=54\"
\n" ); document.write( "\"150%2A54=8100\"\r
\n" ); document.write( "\n" ); document.write( "8100 lbs.
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