document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1170346>Question 1170346</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the speed of the boat in still water is 15 miles per hour. it takes the same amount of time for the boat to travel 10 miles downstream as it does to travel 5 miles upstream. find the speed of the current.<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 #795215 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=795215\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x=speed of current<BR>\n" );
document.write( "15+x downstream and takes 10/(15+x) units are mi/mi/hr or hr<BR>\n" );
document.write( "15-x upstream and takes 5/(15-x) hr<BR>\n" );
document.write( "Those two are equal because they are both the same time<BR>\n" );
document.write( "Cross-multiply, 150-10x =75+5x<BR>\n" );
document.write( "75=15x<BR>\n" );
document.write( "x=5 mph<BR>\n" );
document.write( "downstream and 20 mph and takes 30 min<BR>\n" );
document.write( "upstream and 10 mph and takes 30 min<BR>\n" );
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