document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=121178>Question 121178</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A driver sets out on a 20-mile trip. When he has gone halfway he finds he has averaged 25 mph. At what speed must he travel the rest of the way to make his overall average speed for the trip 40 mph?   </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #88907 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=88907\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 10=25T FOR THE FIRST HALF OF THE TRIP<BR>\n" );
document.write( "10=XT FOR THE SECOND HALF OF THE TRIP<BR>\n" );
document.write( "THE TOTAL TIME=20/40=.5 HOURS.<BR>\n" );
document.write( "10/25+10/X=.5<BR>\n" );
document.write( ".4+10/X=.5<BR>\n" );
document.write( "10/X=.5-.4<BR>\n" );
document.write( "10/X=.1<BR>\n" );
document.write( ".1X=10<BR>\n" );
document.write( "X=10/.1<BR>\n" );
document.write( "X=100 MPH FOR THE SECOND HALF OF THE TRIP.<BR>\n" );
document.write( "PROOF<BR>\n" );
document.write( "10/25+10/100=.5<BR>\n" );
document.write( ".4+.1=.5<BR>\n" );
document.write( ".5=.5 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );