document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=311659>Question 311659</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car travels up a hill at a constant speed of 35 km/h and returns down the hill at a constant speed of 67 km/h. Calculate the average speed (in km/h) for the round trip.  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #222919 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=222919\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A car travels up a hill at a constant speed of 35 km/h and returns down the hill at a constant speed of 67 km/h. Calculate the average speed (in km/h) for the round trip. <BR>\n" );
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document.write( "UP DATA:<BR>\n" );
document.write( "rate = 35 km/h ; time = x hrs ; distance = 35x km<BR>\n" );
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document.write( "Down DATA:<BR>\n" );
document.write( "rate = 67 km/h ; time = y hrs ; distance = 67y  km<BR>\n" );
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document.write( "Average speed = (total distance)/(total time)<BR>\n" );
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document.write( "Ave speed = (35x+67y)/(x+y) km/h<BR>\n" );
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document.write( "cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );