document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1003900>Question 1003900</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The length of a rectangle is 5 times the width.  The area is 720 square centimeters.  Find the length and width of the rectangle. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #620517 by </B><A HREF=/tutors/aboutme.mpl?userid=addingup><B>addingup(3677)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=addingup><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=addingup><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=620517\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The area of the rectangle is:<BR>\n" );
document.write( "Area = Length*Width<BR>\n" );
document.write( "The problem says that the length is 5 times the width:<BR>\n" );
document.write( "L = 5W In the equation above let's substitute Length with this value:<BR>\n" );
document.write( "A = 5W*W Or:<BR>\n" );
document.write( "5w*W = A Now let's plug in the numbers:<BR>\n" );
document.write( "5W*W = 720=<BR>\n" );
document.write( "5*W*W= 720 Multiply W:<BR>\n" );
document.write( "5*W^2= 720 Divide both sides by 5:<BR>\n" );
document.write( "W^2= 144 Take the square root on both sides:<BR>\n" );
document.write( "W= 12 This is the width, and the Length:<BR>\n" );
document.write( "L= 5*12= 60<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "12*60= 720 Multiply on left:<BR>\n" );
document.write( "720= 720 We have the correct answer\r<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );