document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=701552>Question 701552</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 10)	A local building code requires that all factories must be surrounded by a lawn.  The width of the lawn must be uniform and the area of the lawn must be equal to the area of the factory.  What must be the width of a lawn surrounding a rectangular factory that measures 120 m by 80 m?<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #432466 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=432466\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Removed earlier solution because was wrong, rechecked twice more, different but still wrong. \r<BR>\n" );
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document.write( "Two rectangles.  Inner and outer.  Inner is just factory area.  Outer is the area of lawn and factory combined.  Let x be distance from inner side to corresponding outer side, away from the corners locations.  Know that the lawn includes four squares of x^2 area.  Draw this picture.\r<BR>\n" );
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document.write( "Outer area rectangle = (120+2x)(80+2x)<BR>\n" );
document.write( "The outer area is TWO times the inner area,<BR>\n" );
document.write( "Outer area (120+2x)(80+2x)=2(120)(80)<BR>\n" );
document.write( "2*2*(60+x)(40+x)=2*2*60*80<BR>\n" );
document.write( "(60+x)(40+x)=4800<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2%2B100%2Ax-2400=0 ALIGN=MIDDLE  ALT=\"x%5E2%2B100%2Ax-2400=0\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Use general solution to quadratic equation,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=%28-100%2B-+sqrt%28100%5E2-4%2A%28-2400%29%29%29%2F2 ALIGN=MIDDLE  ALT=\"x=%28-100%2B-+sqrt%28100%5E2-4%2A%28-2400%29%29%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x=%28-100%2B-+140%29%2F2 ALIGN=MIDDLE  ALT=\"x=%28-100%2B-+140%29%2F2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x= 20  the width. (the  -140  number in expression is not sensible) </SPAN>\n" );
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