document.write( "Question 584847: The length of a rectangle is five times its width.
\n" ); document.write( "If the perimeter of the rectangle is 72m, find its area.
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Algebra.Com's Answer #372925 by JBarnum(2146)\"\" \"About 
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given/known
\n" ); document.write( "l=5w
\n" ); document.write( "p=2(l+w)
\n" ); document.write( "a=lw
\n" ); document.write( ".
\n" ); document.write( "72=2((5w)+w)
\n" ); document.write( "36=6w
\n" ); document.write( "6=w
\n" ); document.write( ".
\n" ); document.write( "a=(5w)w=5w^2
\n" ); document.write( "a=5(6)^2
\n" ); document.write( "a=5(36)
\n" ); document.write( "a=180
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