document.write( "Question 713743: The length of a rectangle is 3 times its width. The perimeter of the rectangle is 72 cm. Find the demensions of the rectangle. \n" ); document.write( "
Algebra.Com's Answer #438543 by Simnepi(216)\"\" \"About 
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the perimeter of a rectangle is found by adding the lengths of all the sides.
\n" ); document.write( "draw a rectangle!
\n" ); document.write( "Let us call the width of the rectangle x.
\n" ); document.write( "because the length is 3 times the width, the length is 3x.
\n" ); document.write( "adding the lengths of the sides of the rectangle to find the perimeter gives us
\n" ); document.write( "x + 3x + x + 3x
\n" ); document.write( "simplifying this gives
\n" ); document.write( "8x
\n" ); document.write( "since the perimeter is 72 cm then
\n" ); document.write( "8x = 72 cm
\n" ); document.write( "dividing both side by 8 gives
\n" ); document.write( "x = 9cm
\n" ); document.write( "so the width of the rectangle is 9 cm
\n" ); document.write( "and, because the length is 3 times the width, the length is 27 cm.
\n" ); document.write( "so the rectangle's dimensions are
\n" ); document.write( "27 cm by 9 cm. \n" ); document.write( "
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