document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=734125>Question 734125</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A new still unsharpened, wooden pencil has the form of a cylinder. It is 19cm long and has a diameter of 0.8cm.The cylinder hole for the core in the middle of the pencil has a diameter of 0.2cm\r<BR>\n" );
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document.write( "1) calculate how much cm3 of wood is needed for such a pencil  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #448729 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=448729\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> outer volume - inner volume = volume of wood for the pencil\r<BR>\n" );
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document.write( "outer radius =0.8/2 = 0.4 cm<BR>\n" );
document.write( "length = 9 cm\r<BR>\n" );
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document.write( "inner radius = 0.2/2 = 0.1<BR>\n" );
document.write( "length = 9 cmm\r<BR>\n" );
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document.write( "V cylinder = pir^2h\r<BR>\n" );
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document.write( "V(whole pencil) = pi * 0.4^2*9\r<BR>\n" );
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document.write( "V (core) = pi*0.1^2*9\r<BR>\n" );
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document.write( "V ( wood) = pi*0.4*2*9-pi*0.1^2*9\r<BR>\n" );
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document.write( "= 9*pi(0.4^2-0.1^2)<BR>\n" );
document.write( "=4.24 cm^3\r<BR>\n" );
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