document.write( "Question 339795: the width of a rectangle is one-third of the length. if the perimeter is 40cm, find the dimensions of a rectangle.
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Algebra.Com's Answer #243448 by mananth(16946)\"\" \"About 
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let length be 3x
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\n" ); document.write( "Perimeter P = 2*(L+W)
\n" ); document.write( "40=2*(3x+x)
\n" ); document.write( "40=8x
\n" ); document.write( "x=5 cm the width.
\n" ); document.write( "length = 3x = 3*5 =15cm
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\n" ); document.write( "CHECK
\n" ); document.write( "15+15+5+5=40
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