document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=412852>Question 412852</A>: <I><SPAN STYLE=\"word-break: break-all;\">  The length of a rectangle is three times its width. <BR>\n" );
document.write( "If the perimeter of the rectangle is 40m  , find its area<BR>\n" );
document.write( " <BR>\n" );
document.write( " <BR>\n" );
document.write( "   <BR>\n" );
document.write( " <BR>\n" );
document.write( " <BR>\n" );
document.write( " <BR>\n" );
document.write( " <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #289914 by </B><A HREF=/tutors/aboutme.mpl?userid=rfadrogane><B>rfadrogane(214)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rfadrogane><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=rfadrogane><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=289914\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The length of a rectangle is three times its width. <BR>\n" );
document.write( "If the perimeter of the rectangle is 40m  , find its area.<BR>\n" );
document.write( "Sol'n:<BR>\n" );
document.write( "let w-width of the rectangle<BR>\n" );
document.write( "l-length of the rectangle\r<BR>\n" );
document.write( "\n" );
document.write( "l=3w ---(1)<BR>\n" );
document.write( "P=2l+2w=40<BR>\n" );
document.write( "l+w=20 ---(2)<BR>\n" );
document.write( "substitute: (1)into(2)<BR>\n" );
document.write( "3w+w=20<BR>\n" );
document.write( "4w=20<BR>\n" );
document.write( "w=5 m<BR>\n" );
document.write( "l=15 m<BR>\n" );
document.write( "For area:<BR>\n" );
document.write( "A=lw<BR>\n" );
document.write( "A=5(15)<BR>\n" );
document.write( "A=75 m^2 ---answer<BR>\n" );
document.write( "^_^ <BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );