document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=702539>Question 702539</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I am trying to find the radius of a propane tank, with the shape of a cylinder with hemishperes on the ends.  <BR>\n" );
document.write( "Total volume is 791.28 cu ft and <BR>\n" );
document.write( "Cylinder part length of the tank is 10 ft.\r<BR>\n" );
document.write( "\n" );
document.write( "I started with:\r<BR>\n" );
document.write( "\n" );
document.write( "pi*r^2*h + pi*r^3*4/3 = V<BR>\n" );
document.write( ":<BR>\n" );
document.write( "pi/3 * (3r^2*10 + 4r^3) = 791.28<BR>\n" );
document.write( ":<BR>\n" );
document.write( "30r^2 + 4r^3 = 791.28*3/pi<BR>\n" );
document.write( ":<BR>\n" );
document.write( "r^2 * (30+4r) = 756  (using pi=3.14)<BR>\n" );
document.write( ":<BR>\n" );
document.write( "I am stuck at how to solve for \"r\"\r<BR>\n" );
document.write( "\n" );
document.write( "thanks in advance,<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #433038 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=433038\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <font face=\"Times New Roman\" size=\"+2\">\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Use an on-line calculator for cubic equations.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Solve it as <IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE 4r^3\ +\ 30r^2\ -\ 756\ =\ 0\">\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "It is a bit more than 4 ft.  4.045 to three places.\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "John<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=\"/cgi-bin/rendertex.cgi?\LARGE e^{i\pi}\ +\ 1\ =\ 0\"><BR>\n" );
document.write( "<font face=\"Math1\" size=\"+2\">Egw to Beta kai to Sigma</font><BR>\n" );
document.write( "My calculator said it, I believe it, that settles it<BR>\n" );
document.write( "<div  DISABLED_style= \"text-align:center\"><a  rel=nofollow HREF=\"http://outcampaign.org/\" target=\"_blank\"><IMG STYLE=\"max-width:80%;\" src=\"http://cdn.cloudfiles.mosso.com/c116811/scarlet_A.png\" border=\"0\" alt=\"The Out Campaign: Scarlet Letter of Atheism\" width=\"143\" height=\"122\" /></a></div><BR>\n" );
document.write( "</font> </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );