document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=889260>Question 889260</A>: <I><SPAN STYLE=\"word-break: break-all;\"> At the park there is a pool shaped like a circle. A ring shaped path goes around the pool. It's inner diameter is 20 yd and outer is 28 yd. If one gallon of coating can cover 7 yd squared, how many gallons of coating do you need? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #538020 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=538020\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> At the park there is a pool shaped like a circle. A ring shaped path goes around the pool. It's inner diameter is 20 yd and outer is 28 yd. If one gallon of coating can cover 7 yd squared, how many gallons of coating do you need?<BR>\n" );
document.write( "\"area that needs painting\" = \"area of outside ring\" - \"area of inside ring\"<BR>\n" );
document.write( "\"area that needs painting\" = (pi)(28)^2 - (pi)(20)^2<BR>\n" );
document.write( "\"area that needs painting\" = (pi)(28^2 - 20^2)<BR>\n" );
document.write( "\"area that needs painting\" = (3.14)(28^2 - 20^2)<BR>\n" );
document.write( "\"area that needs painting\" = (3.14)(384)<BR>\n" );
document.write( "\"area that needs painting\" = 1205.76 square yards<BR>\n" );
document.write( ".<BR>\n" );
document.write( "paint needed:<BR>\n" );
document.write( "1205.76/7 = 172.25<BR>\n" );
document.write( "or<BR>\n" );
document.write( "173 gallons of paint<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );