document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=332700>Question 332700</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A dairy is required to have a waste holding pond for runoff. Tom plans to build a pond that will be 20 ft by 15 ft. there will be a border of equal length around the pond. the total area of the pond and the border is 500ft. How wide will the border be? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #238401 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=238401\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the pond is 20 by 15<BR>\n" );
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document.write( "let the border width be x<BR>\n" );
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document.write( "so the width including border will be 15+2x  ( x on either side)<BR>\n" );
document.write( "The length including width = 20+2x<BR>\n" );
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document.write( "Area of entire plot including border = 500 sq.ft= (15+2x)(20+2x)<BR>\n" );
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document.write( "4x^2+70x+300=500<BR>\n" );
document.write( "4x^2+70x-200=0<BR>\n" );
document.write( "4x^2+80x-10x-200=0<BR>\n" );
document.write( "4x(x+20)-10(x+20)=0<BR>\n" );
document.write( "(x+20)(4x-10)=0<BR>\n" );
document.write( "4x-10=0<BR>\n" );
document.write( "4x=10<BR>\n" );
document.write( "x=10/4<BR>\n" );
document.write( "x= 2.5 feet.<BR>\n" );
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document.write( "CHECK<BR>\n" );
document.write( "(15+5)*(20+5)= 500  </SPAN>\n" );
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