document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1189060>Question 1189060</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the thickness of the spherical shell. Two metal spheres of radii 8cm and 13cm , respectively are melted down and a cast into a hallow sphere of external radius 15cm.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #820287 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=820287\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The volume of the first is pi*8^3=512 π; the second is π*13^3=2197 π units  cm^3.<BR>\n" );
document.write( "The total volume is their sum or 2709 π cm^3.<BR>\n" );
document.write( "The external radius of the resulting sphere has area 4πr^2 or 900 π cm^2, since r^2=225 cm^2<BR>\n" );
document.write( "The thickness is the total volume of 2709π cm^3/900π cm^2<BR>\n" );
document.write( "or 3.01 cm. </SPAN>\n" );
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