document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1085491>Question 1085491</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A local building code requires that all schools must be surrounded by a lawn. The width of the lawn must<BR>\n" );
document.write( "be uniform and the area of the lawn must equal the area of the school. What must be the width of a lawn<BR>\n" );
document.write( "surrounding a rectangular school that measures 120 m by 80 m? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #699566 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=699566\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Drawing this helps.<BR>\n" );
document.write( "The area of the school is 9600 m^2.<BR>\n" );
document.write( "The area of the lawn must be the same, so the total area must be 19200 m^2.<BR>\n" );
document.write( "The whole 19200 ft^2 is 120+2x by 80+2x, where x equals the uniform width of the lawn.<BR>\n" );
document.write( "That product is 9600+400x+4x^2=19200<BR>\n" );
document.write( "4x^2+400-9600=0<BR>\n" );
document.write( "divide by 4<BR>\n" );
document.write( "x^2+100-2400=0<BR>\n" );
document.write( "(x+120)(x-20)=0<BR>\n" );
document.write( "take positive root only.  x=20 m ANSWER<BR>\n" );
document.write( "The width of the whole area is 160 x 120, and that is 19200 m^2. </SPAN>\n" );
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