document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=284608>Question 284608</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help! A rectangular pool that is 20ft. long and 25ft. wide is to be surrounded by a concrete walk of uniform width. If the owner can only afford to pay for enough concrete to create a total walk area of 504 sq. ft., what is the width of this walk?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #206482 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=206482\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Please help! A rectangular pool that is 20ft. long and 25ft. wide is to be surrounded by a concrete walk of uniform width. If the owner can only afford to pay for enough concrete to create a total walk area of 504 sq. ft., what is the width of this walk? \r<BR>\n" );
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document.write( "let the width of the walk be x\r<BR>\n" );
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document.write( "The length of pool +walk will be 2x+25  ( width x on both sides of the pool)\r<BR>\n" );
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document.write( "The width will be 2x+20 \r<BR>\n" );
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document.write( "The area of pool +walk = (2x+20) * (2x+25)\r<BR>\n" );
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document.write( "The area of the pool = 20*25\r<BR>\n" );
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document.write( "(2x+20)(2x+25)- 500= 504\r<BR>\n" );
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document.write( "2x(2x+25)+20(2x+25)-500=504\r<BR>\n" );
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document.write( "4x^2+50x+40x+500-500=504\r<BR>\n" );
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document.write( "4x^2+90x-504=0\r<BR>\n" );
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document.write( "2x^2+45x-252=0\r<BR>\n" );
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document.write( "a=2, b= 45 * c= -252\r<BR>\n" );
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document.write( "b^2-4ac= 4041\r<BR>\n" );
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document.write( "x1= -45+sqrt4041 / 2*2\r<BR>\n" );
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document.write( "=4.64\r<BR>\n" );
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document.write( "x2=-45-sqrt4041 / 2*2\r<BR>\n" );
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document.write( "x2=-27.1\r<BR>\n" );
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document.write( "the width of the walk = 4.64 feet\r<BR>\n" );
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document.write( " </SPAN>\n" );
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