document.write( "Question 1043117: A rectangle has an area of 126 cm2 and a perimeter of 50 cm. What are its dimensions? \n" ); document.write( "

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\n" ); document.write( "A rectangle has an area of 126 cm2 and a perimeter of 50 cm. What are its dimensions?
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document.write( "L + W = ,\r\n" );
document.write( "LW = 126.\r\n" );
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document.write( "or\r\n" );
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document.write( "L + W = 25,   (1)\r\n" );
document.write( "LW = 126      (2)\r\n" );
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document.write( "Express L = 25-W from (1) and substitute it into (2). You will get\r\n" );
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document.write( "(25-W)*W = 126,  or\r\n" );
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document.write( " = .\r\n" );
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document.write( "Solve this quadratic equation for W. Factor the left side\r\n" );
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document.write( "(W-7)*(W-18) = 0\r\n" );
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document.write( "Answer.  The width is 7 cm. The length is 18 cm.\r\n" );
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\n" ); document.write( "\n" ); document.write( "For many other similar solved problems see the lesson\r
\n" ); document.write( "\n" ); document.write( " - Problems on the area and the perimeter of a rectangle\r
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