document.write( "Question 134860: The width of a rectangle is fixed at 21cm. WHat lenghts will make the perimeter greater that 72 cm.
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Algebra.Com's Answer #98708 by vleith(2983)\"\" \"About 
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w = 21
\n" ); document.write( "Perimeter of a rectangle = 2w + 2l\r
\n" ); document.write( "\n" ); document.write( "We want P > 72\r
\n" ); document.write( "\n" ); document.write( "\"+72+%3E+2w+%2B+2l\"
\n" ); document.write( "\"+72+%3E+2%2A21+%2B+2l\"
\n" ); document.write( "\"+30+%3E+2l+\"
\n" ); document.write( "\"+15+%3E+l+\"\r
\n" ); document.write( "\n" ); document.write( "any length > 15 cm will do it
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