document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1122812>Question 1122812</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A circular pool measures 12 feet across. one cubic yd of concrete is to be used to create a circular border of uniform width around the pool.  if the border is to have a depth of 3 inches,  how wide will the border be? <BR>\n" );
document.write( "(1 cubic yard= 27 cubic feet)<BR>\n" );
document.write( " <BR>\n" );
document.write( "the width of the border is ? feet? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #738997 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=738997\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A circular pool measures 12 feet across. one cubic yd of concrete is to be used to create a circular border of uniform width around the pool.<BR>\n" );
document.write( " if the border is to have a depth of 3 inches, how wide will the border be? <BR>\n" );
document.write( "(1 cubic yard= 27 cubic feet)<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Find the area of the border, divide the volume by the depth; 3\" = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F4 ALIGN=MIDDLE  ALT=\"1%2F4\"   DISABLED_style= \"max-width:90%; height:auto;\" >ft<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=27%2F%281%2F4%29 ALIGN=MIDDLE  ALT=\"27%2F%281%2F4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 108 sq/ft the area of border<BR>\n" );
document.write( ":<BR>\n" );
document.write( "let w = the width of the circular border<BR>\n" );
document.write( "Radius of the pool is half of 12 = 6 ft, therefore<BR>\n" );
document.write( "(w+6) = the radius of the circular area which includes the border<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Find the area of the pool<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi%2A6%5E2 ALIGN=MIDDLE  ALT=\"pi%2A6%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 113.097 sq/ft<BR>\n" );
document.write( "Find the total area which includes the border<BR>\n" );
document.write( "113.097 + 108 = 221.097 sq/ft<BR>\n" );
document.write( ":<BR>\n" );
document.write( "find the width of the border<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi%2A%28w%2B6%29%5E2 ALIGN=MIDDLE  ALT=\"pi%2A%28w%2B6%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 221.097<BR>\n" );
document.write( "FOIL, divide by pi<BR>\n" );
document.write( "w^2 + 12w + 36 = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=221.097%2Fpi ALIGN=MIDDLE  ALT=\"221.097%2Fpi\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "w^2 + 12w + 36 = 70.377<BR>\n" );
document.write( "w^2 + 12w + 36 - 70.377 = 0<BR>\n" );
document.write( "w^2 + 12w - 34.377 = 0<BR>\n" );
document.write( "use quadratic formula, a=1; b=12; c=-34.377<BR>\n" );
document.write( "the positive solution<BR>\n" );
document.write( "w = 2.3891 ft is the width of the border (2 ft 4<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2F3 ALIGN=MIDDLE  ALT=\"2%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" >in)<BR>\n" );
document.write( ":<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Check this. find the area using the overall radius: 8.3891 ft<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi%2A8.3891%5E2 ALIGN=MIDDLE  ALT=\"pi%2A8.3891%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 221.095 sq/ft<BR>\n" );
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