document.write( "Question 599520: A contractor agrees to build a dam 180ft long and 20fthigh12ftwide at the bottom and 8ftwide at the top for 9.75 a cubic yard Find his profit if his costs were 10000? \n" ); document.write( "
Algebra.Com's Answer #379006 by Alan3354(69443)\"\" \"About 
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A contractor agrees to build a dam 180ft long and 20fthigh12ftwide at the bottom and 8ftwide at the top for 9.75 a cubic yard Find his profit if his costs were 10000?
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\n" ); document.write( "Find the volume.
\n" ); document.write( "Vol = area of the trapezoid x the length
\n" ); document.write( "= L*h*(20+8)/2 = 180*20*14
\n" ); document.write( "= 50400 cubic ft
\n" ); document.write( "50400/27 = 1866.67 cubic yards
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\n" ); document.write( "Price = Vol*$9.75 = $17864
\n" ); document.write( "- $10000 = $7864 profit
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