document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=320479>Question 320479</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The excursion boat on the river takes 2½ hours to make the trip to a point 12 miles upstream and to return. If the rate at which the boat travels in still water is 5 times the rate of the river current, what is the rate 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 #229597 by </B><A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><B>ankor@dixie-net.com(22740)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ankor@dixie-net.com><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=ankor@dixie-net.com><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=229597\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The excursion boat on the river takes 2½ hours to make the trip to a point 12 miles upstream and to return. <BR>\n" );
document.write( "If the rate at which the boat travels in still water is 5 times the rate of the<BR>\n" );
document.write( "river current, what is the rate of the current?<BR>\n" );
document.write( ":<BR>\n" );
document.write( "let x = rate of the current<BR>\n" );
document.write( "and<BR>\n" );
document.write( "5x = rate of the boat in still water<BR>\n" );
document.write( "then<BR>\n" );
document.write( "5x - x = 4x; effective rate upstream<BR>\n" );
document.write( "and<BR>\n" );
document.write( "5x + x = 6x; effective rate downstream<BR>\n" );
document.write( ":<BR>\n" );
document.write( "write a time equation, time = dist/speed<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Upstream time + downstream time = 2.5 hrs<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12%2F4x ALIGN=MIDDLE  ALT=\"12%2F4x\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=12%2F6x ALIGN=MIDDLE  ALT=\"12%2F6x\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 2.5 hrs<BR>\n" );
document.write( "reduce fractions<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=3%2Fx ALIGN=MIDDLE  ALT=\"3%2Fx\"   DISABLED_style= \"max-width:90%; height:auto;\" > + <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=2%2Fx ALIGN=MIDDLE  ALT=\"2%2Fx\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 2.5<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5%2Fx ALIGN=MIDDLE  ALT=\"5%2Fx\"   DISABLED_style= \"max-width:90%; height:auto;\" > = 2.5<BR>\n" );
document.write( "5 = 2.5x<BR>\n" );
document.write( "x = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=5%2F2.5 ALIGN=MIDDLE  ALT=\"5%2F2.5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x = 2 mph is the rate of the current<BR>\n" );
document.write( ":<BR>\n" );
document.write( ":<BR>\n" );
document.write( "Check solution find the times; boat rate 2(5) = 10 mph<BR>\n" );
document.write( "12/8 = 1.5 hr<BR>\n" );
document.write( "12/12 = 1 hr<BR>\n" );
document.write( "-------------<BR>\n" );
document.write( "total: 2.5 hr<BR>\n" );
document.write( " </SPAN>\n" );
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