document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1178857>Question 1178857</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangular swimming pool with<BR>\n" );
document.write( "dimensions of 11m and 8m is built<BR>\n" );
document.write( "in a rectangular backyard. The<BR>\n" );
document.write( "area of the backyard is 1120m2<BR>\n" );
document.write( ". If<BR>\n" );
document.write( "the strip of the yard surrounding<BR>\n" );
document.write( "the pool is of uniform width, how<BR>\n" );
document.write( "wide is the strip? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #808326 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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/cgi-bin/show-face.mpl?user=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=808326\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> \r<BR>\n" );
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document.write( "A rectangular swimming pool with<BR>\n" );
document.write( "dimensions of 11m and 8m <BR>\n" );
document.write( "Area of pool = 11*8=88 m*2\r<BR>\n" );
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document.write( "let the width of the of side walk be x\r<BR>\n" );
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document.write( "total area = (11+2x)(8+2x)=1120\r<BR>\n" );
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document.write( "88+22x+4x^2 +16x=1120\r<BR>\n" );
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document.write( "4x^2+38x -1032=0\r<BR>\n" );
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document.write( "4x^2-48x+86x-1032=0\r<BR>\n" );
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document.write( "4x(x-12)+86(x-12)=0\r<BR>\n" );
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document.write( "(x-12)(4x+86)=0\r<BR>\n" );
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document.write( "roots 12, -21,5\r<BR>\n" );
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document.write( "ignore negative\r<BR>\n" );
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document.write( "x=12m the width of walkway\r<BR>\n" );
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document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );