document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=174100>Question 174100</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello, I have a question that im extremely stuck on.The question is as follows:- A circular pool has a radius r. It is surrounded by a path which is 2 metres wide. Work out a formula for the area of the path and give its area when r=2.5 metres.Please could you show the step by step guide on how i would work this out.Many thanks </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #128986 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=128986\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A circular pool has a radius r. It is surrounded by a path which is 2 metres wide. Work out a formula for the area of the path and give its area when r=2.5 metres.Please could you show the step by step guide on how i would work this out.Many thanks<BR>\n" );
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document.write( "The area of the path is the area of the outside circle, minus the area of the inside circle (called an annulus).<BR>\n" );
document.write( "The inside circle is the pool, radius r.  The outide circle has a radius of r+2.<BR>\n" );
document.write( "Area outside = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi%2A%28r%2B2%29%5E2 ALIGN=MIDDLE  ALT=\"pi%2A%28r%2B2%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Area inside = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi%2Ar%5E2 ALIGN=MIDDLE  ALT=\"pi%2Ar%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "AO - AI = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi%28r%2B2%29%5E2+-+pi%2Ar%5E2 ALIGN=MIDDLE  ALT=\"pi%28r%2B2%29%5E2+-+pi%2Ar%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi%2A%28%28r%5E2+%2B+4r+%2B+4%29+-r%5E2%29 ALIGN=MIDDLE  ALT=\"pi%2A%28%28r%5E2+%2B+4r+%2B+4%29+-r%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "= <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=pi%2A%284r%2B4%29 ALIGN=MIDDLE  ALT=\"pi%2A%284r%2B4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "For r=2.5:<BR>\n" );
document.write( "= pi*(10 + 4)<BR>\n" );
document.write( "= 14*pi<BR>\n" );
document.write( "=~ 43.98 sq meters\r<BR>\n" );
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document.write( " </SPAN>\n" );
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