document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=878327>Question 878327</A>: <I><SPAN STYLE=\"word-break: break-all;\">  for two hours of a 400 mile trip your average speed is 40 mph. Determine the average speed that must be maintained for the remainder of the trip if you want to average speed for the trip to be 50 mph </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #530044 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=530044\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> for two hours of a 400 mile trip your average speed is 40 mph. Determine the average speed that must be maintained for the remainder of the trip if you want to average speed for the trip to be 50 mph<BR>\n" );
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document.write( "average speed=distance/travel time<BR>\n" );
document.write( "remainder of trip=400-80=320 miles<BR>\n" );
document.write( "let x=travel time for remainder of trip at 50 mph<BR>\n" );
document.write( "400/(2+x)=50<BR>\n" );
document.write( "100+50x=400<BR>\n" );
document.write( "50x=300<BR>\n" );
document.write( "x=6 hrs<BR>\n" );
document.write( "speed=320/6=53 1/3 mph<BR>\n" );
document.write( " </SPAN>\n" );
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