document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=166056>Question 166056</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat traveled 210 miles downstream and back. The trip downstream took 10 hours. The trip back took 70 hours. What is the speed of the boat in still water? What is the speed of the current?\r<BR>\n" );
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document.write( "so far i had 10c+70s=210m<BR>\n" );
document.write( "but i don't think that's right. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #122390 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley77><B>checkley77(12844)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley77><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=122390\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 210/10=21 mph down stream.<BR>\n" );
document.write( "210/70=3 mph up stream.<BR>\n" );
document.write( "(21-3)/2=18/2=9 mph is the speed of the stream.<BR>\n" );
document.write( "Proof:<BR>\n" );
document.write( "21-9=12 mph for the speed of the boat in still water.<BR>\n" );
document.write( "3+9=12 ditto.<BR>\n" );
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