document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=956484>Question 956484</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boat makes a trip downstream in 3 hours. it makes the upstream trip in the same current in 4 hours. the speed of the boat in still water would've been 11.2 per hours. what is the speed of the current? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #584343 by </B><A HREF=/tutors/aboutme.mpl?userid=macston><B>macston(5194)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=macston><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=macston><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=584343\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If the given speed of the boat in still water is 11.2 miles/hour:<BR>\n" );
document.write( "r=rate of current<BR>\n" );
document.write( "3hrs(11.2mph+r)=4hrs(11.2mph-r)<BR>\n" );
document.write( "33.6miles+3r hrs=44.8 miles-4r hrs Subtract 33.6 miles from each side.<BR>\n" );
document.write( "3r hrs=11.2 miles-4r hrs Add 4r hrs to each side<BR>\n" );
document.write( "7r hrs=11.2 miles Divide each side by 7 hrs<BR>\n" );
document.write( "r=11.2/7 mph=1.6 mph ANSWER The rate of the current was 1.6 mph.<BR>\n" );
document.write( "CHECK:<BR>\n" );
document.write( "3hrs(11.2mph+r)=4hrs(11.2mph-r)<BR>\n" );
document.write( "3hrs(11.2mph+1.6mph)=4hrs(11.2mph-1.6mph) <BR>\n" );
document.write( "3hrs(12.8mph)=4hrs(9.6mph)<BR>\n" );
document.write( "38.4miles=38.4miles </SPAN>\n" );
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