document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=370581>Question 370581</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The riverboat Hiawatha goes 30 km upstream and back in 4 hours. If the Hiawatha's speed in still water is 16 km/h, what is the speed of the current?\r<BR>\n" );
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document.write( "I set this problem up on a chart and had 30/16-r + 30/16+r = 4 and ended up getting r=16km/h. I am not quite sure if I set this problem up right.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #264134 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16949)</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=264134\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 30/(16-r)+30/(16+r)=4<BR>\n" );
document.write( "30(16+r)+30(16-r)/(256-r^2)=4<BR>\n" );
document.write( "480+30r+480-30r/(256-r^2)=4<BR>\n" );
document.write( "960=4(256-r^2)<BR>\n" );
document.write( "/4<BR>\n" );
document.write( "240=256-r^2<BR>\n" );
document.write( "r^2=256-240<BR>\n" );
document.write( "r^2=16<BR>\n" );
document.write( "Take the square root<BR>\n" );
document.write( "r = 4 mph.<BR>\n" );
document.write( "I think you forgot to take the square root since r^2=16<BR>\n" );
document.write( "...<BR>\n" );
document.write( "m.ananth@hotmail.ca </SPAN>\n" );
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