document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=33064>Question 33064</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangular garden is to be surrounded by a walkway of constant width.  The garden's dimensions are 30 ft by 40 ft.  The total area , garden plus walkway, is to be 1800 ft^2.  What must be the width of the walkway to the nearest thousandth?\r<BR>\n" );
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document.write( "Thank you. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #19498 by </B><A HREF=/tutors/aboutme.mpl?userid=Paul><B>Paul(988)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Paul><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=19498\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Let the width be x<BR>\n" );
document.write( "Since 2 width on each side we represent this as:<BR>\n" );
document.write( "30-2x and 40-2x<BR>\n" );
document.write( "(30-2x)(40-2x)=1800<BR>\n" );
document.write( "1200+2x^2+10x=1800<BR>\n" );
document.write( "2x^2+10x-600=0<BR>\n" );
document.write( "x^2+5x-300=0<BR>\n" );
document.write( "Factor:<BR>\n" );
document.write( "(x+20) and (x-15)<BR>\n" );
document.write( "x=15<BR>\n" );
document.write( "Hence, the uniform width around the garden is 15cm each.<BR>\n" );
document.write( "Paul. </SPAN>\n" );
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