document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=87540>Question 87540</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The speed of a hiker averages 2 km per hour uphill and 6 km per hour downhill.What is his average speed for the entire trip? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #63458 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=63458\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The speed of a hiker averages 2 km per hour uphill and 6 km per hour downhill.What is his average speed for the entire trip?<BR>\n" );
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document.write( "Let the distance be \"x\" km.<BR>\n" );
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document.write( "Uphill DATA:<BR>\n" );
document.write( "Distance = x km ; rate = 2 km/h ; time = d/r = x/2 hrs<BR>\n" );
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document.write( "Downhill DATA:<BR>\n" );
document.write( "Distance = x km ; rate = 6 km/h ; time = d/r = x/6 hrs<BR>\n" );
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document.write( "Total Trip DATA:<BR>\n" );
document.write( "Distance = 2x km ; Time = x/2 + x/6 = 8x/12 = 2x/3 hrs<BR>\n" );
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document.write( "Total Trip Rate:<BR>\n" );
document.write( "d/t = r<BR>\n" );
document.write( "(2x)/(2x/3) = 3 km/hr<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
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