document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=123264>Question 123264</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A rectangular lawn has dimensions 30 metres by 40 metres. A strip of uniform width is to be mowed around the perimeter.How wide should the strip be so that exactly half of the lawn gets mowed ? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #90440 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=90440\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 30*40=2(30-2X)(40-2X)<BR>\n" );
document.write( "1200=2(1200-80X-60X+4X^2)<BR>\n" );
document.write( "1200=2(1200-140X+4X^2)<BR>\n" );
document.write( "1200=2400-280X+8X^2<BR>\n" );
document.write( "8X^2-280X+2400-1200=0<BR>\n" );
document.write( "8X^2-280X+1200<BR>\n" );
document.write( "8(X^2-35X+150)<BR>\n" );
document.write( "8(X-5)(X-30)=0<BR>\n" );
document.write( "X-5=0<BR>\n" );
document.write( "X=5 ANSWER FOR THE WIDTH OF THE STRIP MOWED TO REDUCE THE LAWN TO 50%.<BR>\n" );
document.write( "PROOF<BR>\n" );
document.write( "(30-2*5)(40-2*5)=1200/2<BR>\n" );
document.write( "20*30=600<BR>\n" );
document.write( "600=600 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );