document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=199699>Question 199699</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangular building that measures 100m by 80m is to be surrounded by a lawn of uniform width. The area of the lawn must be equal the area of the building. Find the width of the lawn, to the nearest tenth of a metre.\r<BR>\n" );
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document.write( "Thanks soo much.. exam tomorrow =( </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #150069 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=150069\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> area of building is 80m * 100m or 8000m^2\r<BR>\n" );
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document.write( "let x = \"width of lawn\"<BR>\n" );
document.write( "so dimensions of building plus lawn are 80+2x by 100+2x\r<BR>\n" );
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document.write( "since the area of the lawn equals the area of the building,<BR>\n" );
document.write( "(80+2x)(100+2x) = 2 * 8000\r<BR>\n" );
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document.write( "FOILing ___ 8000 + 360x + 4x^2 = 16000\r<BR>\n" );
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document.write( "subtracting 16000 and dividing by 4 ___ x^2 + 90x - 2000 = 0\r<BR>\n" );
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document.write( "use quadratic formula to find x </SPAN>\n" );
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