document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=48330>Question 48330</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A solar collector is 2.5m long by 2.0m wide. It is held in place by a frame of uniform width around its outside edge. If the exposed collector area is 2.5m^2 , what is the width of the frame, to the nearest tenth of a centimeter? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #31976 by </B><A HREF=/tutors/aboutme.mpl?userid=venugopalramana><B>venugopalramana(3286)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=venugopalramana><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.geocities.com/venugopalramana/FREE_MATHS_ASSISTANCE.html valign=middle><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=31976\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A solar collector is 2.5m long by 2.0m wide. It is held in place by a frame of uniform width around its outside edge. If the exposed collector area is 2.5m^2 , what is the width of the frame, to the nearest tenth of a centimeter?<BR>\n" );
document.write( "let the width of frame = x<BR>\n" );
document.write( "length of frame=x+2.5+x=2.5+2x<BR>\n" );
document.write( "width of frame =x+2+x=2x+2<BR>\n" );
document.write( "area of frame & reflector assembly=(2x+2.5)(2x+2)=4x^2+9x+5<BR>\n" );
document.write( "area of collector=2.5*2=5<BR>\n" );
document.write( "exposed area =4x^2+9x+5-5=2.5<BR>\n" );
document.write( "4x^2+9x-2.5=0<BR>\n" );
document.write( "8x^2+18x-5=0<BR>\n" );
document.write( "x={-18+sqrt(18^2+4*5*8)}/16=1/4 metre=100/4 cm = 25 cm. </SPAN>\n" );
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