document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=775682>Question 775682</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a man who can row 4 miles per hour in still water finds that it requires 6 1/2 hours to row upstream a distance requiring 3 1/4 hours to row downstream. what is the rate of the stream? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #473105 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39620)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=473105\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ASSIGN VARIABLES<BR>\n" );
document.write( "r = rate in still water, 4 mph<BR>\n" );
document.write( "c = speed of the current, unknown<BR>\n" );
document.write( "u = time traveled upstream, 6.5 hours<BR>\n" );
document.write( "b = time traveled back downstream, 3.25 hours\r<BR>\n" );
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document.write( "Direction__________speed___________time___________distance<BR>\n" );
document.write( "up_________________r-c_____________u______________d=(r-c)u<BR>\n" );
document.write( "down_______________r+c_____________b______________d=(r+c)b\r<BR>\n" );
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document.write( "The essential equation is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight%28%28r-c%29u=%28r%2Bc%29b%29 ALIGN=MIDDLE  ALT=\"highlight%28%28r-c%29u=%28r%2Bc%29b%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > and the only unknown variable is c.<BR>\n" );
document.write( "Solve for c. </SPAN>\n" );
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