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)![]() ![]() You can put this solution on YOUR website! 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( "------------------ \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 \n" ); document.write( "---- \n" ); document.write( "Price = Vol*$9.75 = $17864 \n" ); document.write( "- $10000 = $7864 profit \n" ); document.write( " \n" ); document.write( " |