document.write( "Question 1036586: The perimeter of rectangle is 240cm if it's length decreased by 1o% and the breadth is increased by 20% we get the same perimeter. Find the original length and breadth of the rectangle \n" ); document.write( "

Algebra.Com's Answer #651265 by ikleyn(52781) $\"\"$ $\"About$

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\n" ); document.write( "The perimeter of rectangle is 240cm if it's length decreased by 1o% and the breadth is increased by 20% we get the same perimeter.
\n" ); document.write( "Find the original length and breadth of the rectangle
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document.write( "   x +    y = 120,      (1)     ( 120 =  )\r\n" );
document.write( "0.9x + 1.2y = 120.      (2)\r\n" );
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document.write( "Multiply eq. (1) by 0.9 and distract from the eq. (2). You will get\r\n" );
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document.write( "0.3y = 120 - 108,\r\n" );
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document.write( "0.3y = 12,\r\n" );
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document.write( "y =  = 40.\r\n" );
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document.write( "Answer. The width was 40 cm, the length was 120 - 40 = 80 cm.\r\n" );
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