document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=616264>Question 616264</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help me solve the following problem. I have tried everything I can think of and am completely lost. the problem is: You want to install a 3 yard wide walkway around a circular swimming pool. The diameter of the pool is 18 yards what is the area of the walkway? I tried the area formula and subtracting the area of the pool but that was not it. Can you also show me the formula you used as well?<BR>\n" );
document.write( "Thank you very very much,<BR>\n" );
document.write( "Kayla </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #387585 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=387585\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Area of Pool+Walkway\r<BR>\n" );
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document.write( "A = pi*r^2\r<BR>\n" );
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document.write( "A = pi*21^2\r<BR>\n" );
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document.write( "Note: the radius in this case is 18+3 = 21 yards (draw out a picture to see this)\r<BR>\n" );
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document.write( "A = pi*441\r<BR>\n" );
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document.write( "A = 441pi\r<BR>\n" );
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document.write( "So the exact area of the Pool+Walkway is 441pi square yards\r<BR>\n" );
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document.write( "Area of the Pool Only\r<BR>\n" );
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document.write( "A = pi*r^2\r<BR>\n" );
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document.write( "A = pi*18^2\r<BR>\n" );
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document.write( "A = pi*324\r<BR>\n" );
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document.write( "A = 324pi\r<BR>\n" );
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document.write( "and the area of the Pool only is exactly 324pi square yards.\r<BR>\n" );
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document.write( "Area of Walkway = (Area of Pool+Walkway) - (Area of Pool Only)\r<BR>\n" );
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document.write( "Area of Walkway = (441pi) - (324pi)\r<BR>\n" );
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document.write( "Area of Walkway = 441pi - 324pi\r<BR>\n" );
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document.write( "Area of Walkway = (441 - 324)pi\r<BR>\n" );
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document.write( "Area of Walkway = (117)pi\r<BR>\n" );
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document.write( "Area of Walkway = 117pi\r<BR>\n" );
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document.write( "So the exact area of the walkway only is 117pi\r<BR>\n" );
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document.write( "To find the approximate area, replace pi with 3.14159 (use more digits of pi for greater accuracy) to get\r<BR>\n" );
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document.write( "117pi = 117(3.14159) = 367.56603\r<BR>\n" );
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document.write( "=====================================================================================\r<BR>\n" );
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document.write( "Answers:\r<BR>\n" );
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document.write( "Exact area of the walkway only: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=117pi ALIGN=MIDDLE  ALT=\"117pi\"   DISABLED_style= \"max-width:90%; height:auto;\" > square yards\r<BR>\n" );
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document.write( "Approximate area of the walkway only: 367.56603 square yards </SPAN>\n" );
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