document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=631784>Question 631784</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Seven hard plastic tubes of radius 2 cm are tied tightly together.If the string is wound around twice and a 5 cm piece is needed for tying the knot,how much string is needed? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #397972 by </B><A HREF=/tutors/aboutme.mpl?userid=KMST><B>KMST(5328)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=KMST><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=KMST><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=397972\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Here is a cross section of the bundle of tubes, tied with a red string:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=drawing%28300%2C300%2C-7%2C7%2C-7.8%2C6.2%2C%0D%0Acircle%280%2C0%2C2%29%2C%0D%0Acircle%280%2C4%2C2%29%2Ccircle%280%2C-4%2C2%29%2C%0D%0Acircle%28-3.464%2C2%2C2%29%2Ccircle%283.464%2C2%2C2%29%2C%0D%0Acircle%28-3.464%2C-2%2C2%29%2Ccircle%283.464%2C-2%2C2%29%2C%0D%0Ared%28circle%280%2C0%2C6%29%29%2C%0D%0Ared%28circle%28-3%2C-5.2%2C0.2%29%29%2Cred%28circle%280%2C0%2C6.1%29%29%2C%0D%0Ared%28line%28-3%2C-5.2%2C-3%2C-7.6%29%29%2Cred%28line%28-3%2C-5.2%2C-5.4%2C-5.5%29%29%0D%0A%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" > The radius is 2 cm for the small circles, 6 cm for the large, red one.<BR>\n" );
document.write( "The length (in <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28cm%29 ALIGN=MIDDLE  ALT=\"highlight%28cm%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >) of string needed is 2 times the circumference of the red circle plus:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2A%282%2Api%2A6%29%2B5=24%2Api%2B5=highlight%2880.4%29 ALIGN=MIDDLE  ALT=\"2%2A%282%2Api%2A6%29%2B5=24%2Api%2B5=highlight%2880.4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > cm (rounded to the millimeter). </SPAN>\n" );
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