document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=729310>Question 729310</A>: <I><SPAN STYLE=\"word-break: break-all;\"> what is the approximate surface area of a cardboard tube that is open at both ends, has a diameter of 3 inches, and has a height of 7.25 inches? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #445812 by </B><A HREF=/tutors/aboutme.mpl?userid=fcabanski><B>fcabanski(1391)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=fcabanski><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=445812\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Surface area of a cylinder (a tube is a cylinder) is 2 times the area of the base plus circumference times height.  Since this is a tube without ends, there is no surface area on the bases.  So the surface area is just area of the base times the height. <P><BR>\n" );
document.write( "The circumference of a circle is pi*d.<P><BR>\n" );
document.write( "SA = pi*d*h = pi*3*7.25 = approximately 68.33 square inches.<P>\r<BR>\n" );
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