document.write( "Question 1106876: the length of a rectangle is twice its width. the perimeter is 90 cm what is the area of the rectangle
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Algebra.Com's Answer #721862 by stanbon(75887) ![]() You can put this solution on YOUR website! the length of a rectangle is twice its width. the perimeter is 90 cm what is the area of the rectangle \n" ); document.write( "------ \n" ); document.write( "Equations: \n" ); document.write( "L = 2*W \n" ); document.write( "2(L+W) = 90 \n" ); document.write( "------------------------------------- \n" ); document.write( "L = 2*W \n" ); document.write( "L + W = 45 \n" ); document.write( "----- \n" ); document.write( "Substitute for \"L\" and solve for \"W\":: \n" ); document.write( "2W + W = 45 \n" ); document.write( "3W = 45 \n" ); document.write( "Width = 15 cm \n" ); document.write( "---- \n" ); document.write( "L = 2*W = 30 cm \n" ); document.write( "------------------- \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "------------------- \n" ); document.write( " |