document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=383609>Question 383609</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hi<BR>\n" );
document.write( "    Stuck on this, can someone please help\r<BR>\n" );
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document.write( "The total surface area S of a closed cone of base radius r cm and perpendicular height h cm is given byS = pir^2 + pi r sqrt(r^2 + h^2). If r and h are each increasing at the rate of 0.25 cm s^-1, find the rate at which S is increasing at the instantwhen r = 3 and h = 4.\r<BR>\n" );
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document.write( " Thank You, </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #271660 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=271660\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=S+=+pi%2Ar%5E2+%2B+pi%2Ar%2Asqrt%28r%5E2+%2B+h%5E2%29 ALIGN=MIDDLE  ALT=\"S+=+pi%2Ar%5E2+%2B+pi%2Ar%2Asqrt%28r%5E2+%2B+h%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "Differentiate with both <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r ALIGN=MIDDLE  ALT=\"r\"   DISABLED_style= \"max-width:90%; height:auto;\" > and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h ALIGN=MIDDLE  ALT=\"h\"   DISABLED_style= \"max-width:90%; height:auto;\" > as variables. <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=dS=2%2Api%2Ar%2Adr%2Bpi%2Ar%2A%281%2F%282%2Asqrt%28r%5E2%2Bh%5E2%29%29%29%2A%282r%2Adr%2B2h%2Adh%29%2B+pi%2Asqrt%28r%5E2%2Bh%5E2%29%2Adr ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Substitute <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=r=3 ALIGN=MIDDLE  ALT=\"r=3\"   DISABLED_style= \"max-width:90%; height:auto;\" >, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=h=4 ALIGN=MIDDLE  ALT=\"h=4\"   DISABLED_style= \"max-width:90%; height:auto;\" >, <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=dr=dh=0.25 ALIGN=MIDDLE  ALT=\"dr=dh=0.25\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=dS=2%2Api%2A3%2A%280.25%29%2Bpi%2A3%2A%281%2F%282%2Asqrt%283%5E2%2B4%5E2%29%29%29%2A%282%283%29%2A%280.25%29%2B2%284%29%2A%280.25%29%29%2B+pi%2Asqrt%283%5E2%2B4%5E2%29%2A%280.25%29 ALIGN=MIDDLE   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( ".<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=dS=%283%2F2%29%2Api%2Bpi%2A3%2A%281%2F%282%2A5%29%29%2A%283%2F2%2B2%29%2B+pi%2A%285%2F4%29 ALIGN=MIDDLE  ALT=\"dS=%283%2F2%29%2Api%2Bpi%2A3%2A%281%2F%282%2A5%29%29%2A%283%2F2%2B2%29%2B+pi%2A%285%2F4%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=dS=pi%2A%28%283%2F2%29%2B%2821%2F20%29%2B%285%2F4%29%29 ALIGN=MIDDLE  ALT=\"dS=pi%2A%28%283%2F2%29%2B%2821%2F20%29%2B%285%2F4%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=dS=pi%2A%28%2830%2F20%29%2B%2821%2F20%29%2B%2825%2F20%29%29 ALIGN=MIDDLE  ALT=\"dS=pi%2A%28%2830%2F20%29%2B%2821%2F20%29%2B%2825%2F20%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( ".<BR>\n" );
document.write( ".<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=dS=%2819%2F5%29%2Api ALIGN=MIDDLE  ALT=\"dS=%2819%2F5%29%2Api\"   DISABLED_style= \"max-width:90%; height:auto;\" ><IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=cm%5E2%2Fs ALIGN=MIDDLE  ALT=\"cm%5E2%2Fs\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( " </SPAN>\n" );
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