document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=894922>Question 894922</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a man walks x km uphill at 3km/h and walks the same distance back at 6km/h. What is his average speed? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #542470 by </B><A HREF=/tutors/aboutme.mpl?userid=richwmiller><B>richwmiller(17219)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richwmiller><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=richwmiller><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=542470\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> let 's say the man walks 1 hour<BR>\n" );
document.write( "r*t=d<BR>\n" );
document.write( "3*1=3 km<BR>\n" );
document.write( "so he walks 3 km up<BR>\n" );
document.write( "so he walks 3 km downhill twice as fast so he takes half the time\r<BR>\n" );
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document.write( "6*.5=3<BR>\n" );
document.write( "1 hour up and 1/2 hour down=1.5 hr<BR>\n" );
document.write( "r=d/t=6/1.5=4 kph\r<BR>\n" );
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document.write( "let's say he takes 2 hours uphill\r<BR>\n" );
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document.write( "3*2=6<BR>\n" );
document.write( "he goes 6 km<BR>\n" );
document.write( "going down he goes 6 kph for one hour<BR>\n" );
document.write( "6*1=6<BR>\n" );
document.write( "r=d/t=12/3=4 kph<BR>\n" );
document.write( " </SPAN>\n" );
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