document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=531232>Question 531232</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Your brother competed in a long bicycle race.  For the 1st half of the race he averaged 20 mi/h.  For the 2nd half of the race he averaged 13 mi/h.  What is his average speed in miles per hour for the whole race?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #350377 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=350377\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Your brother competed in a long bicycle race. <BR>\n" );
document.write( "For the 1st half of the race he averaged 20 mi/h.<BR>\n" );
document.write( "DATA: rate = 20mph ; distance = x miles ; time = x/20 hrs<BR>\n" );
document.write( "--------------------- <BR>\n" );
document.write( "For the 2nd half of the race he averaged 13 mi/h.<BR>\n" );
document.write( "DATA: rate = 13 mph ; distance = x miles ; time = x/13 hrs<BR>\n" );
document.write( "------- <BR>\n" );
document.write( "What is his average speed in miles per hour for the whole race? <BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "Average = total distance/total time<BR>\n" );
document.write( "Ave = (2x)/[(x/20)+(x/13)] <BR>\n" );
document.write( "Ave = (2x)/(33x/(260))<BR>\n" );
document.write( "Average speed  = 520/33 mph = 15.76 mph<BR>\n" );
document.write( "===============<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
document.write( "============== </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );