document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=844312>Question 844312</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A river flows at a rate of 4 km per hour. for a cruiser to travel 60 km upriver then return in a total of 8 hr, how fast must the boat be able to travel in still water?\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #508695 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=508695\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a+b=8,<BR>\n" );
document.write( "(c+4)*a=60,<BR>\n" );
document.write( "(c-4)*b=60<BR>\n" );
document.write( "a = 3 hours ,   b = 5 hours,   c = 16 kph<BR>\n" );
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