document.write( "Question 152448: The width of a rectangle is 2/3 of its length. Find its length if the perimeter is 80 cm. Find the dimensions.\r
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Algebra.Com's Answer #112077 by jojo14344(1513) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"P=2%28L%2BW%29\"$ --------------------> eqn 1
\n" ); document.write( "But, $\"W=%282%2F3%29L\"$ , so
\n" ); document.write( " $\"P=2%28L%2B%282%2F3%29L%29\"$
\n" ); document.write( " $\"80cm=2%28%283L%2B2L%29%2F3%29%29\"$ , adding & cross multiply
\n" ); document.write( " $\"%2880%2A3%29%2F2=5L\"$
\n" ); document.write( " $\"120=5L\"$ ---------> $\"cross%28120%2924%2Fcross%285%29=cross%285%29L%2Fcross%285%29\"$
\n" ); document.write( " $\"L=24cm\"$
\n" ); document.write( "And, $\"W=%282%2F3%2924=16cm\"$
\n" ); document.write( "In doubt? Go back eqn 1:
\n" ); document.write( " $\"80cm=2%2824cm%2B16cm%29\"$
\n" ); document.write( " $\"80cm=2%2840cm%29\"$
\n" ); document.write( " $\"80cm=80cm\"$
\n" ); document.write( "Thank you,
\n" ); document.write( "Jojo \n" ); document.write( "

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