document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1197471>Question 1197471</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A car covered a certain distance at a speed of 24 mph. While returning, the car covered the same distance at a speed of 16 mph. What was the average speed of the car for the entire journey? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #830770 by </B><A HREF=/tutors/aboutme.mpl?userid=greenestamps><B>greenestamps(13203)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=greenestamps><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=greenestamps><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=830770\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <br><BR>\n" );
document.write( "I definitely agree with tutor @Math_tutor2020 that it is better to solve the problem by a method that you understand, rather than by blindly plugging numbers into a magic formula.<br><BR>\n" );
document.write( "Here is an informal solution method that is similar to his, yet very different.<br><BR>\n" );
document.write( "The ratio of the two speeds is 24:16 = 3:2, and the distances there and back are the same.  That means the ratio of the times at the two speeds is 2:3.<br><BR>\n" );
document.write( "So 2/5 of the total time is spent at 24mph and 3/5 of the total time is spent at 16mph.  The average speed in mph is then<br><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%282%2F5%29%2824%29%2B%283%2F5%29%2816%29=48%2F5%2B48%2F5=96%2F5 ALIGN=MIDDLE  ALT=\"%282%2F5%29%2824%29%2B%283%2F5%29%2816%29=48%2F5%2B48%2F5=96%2F5\"   DISABLED_style= \"max-width:90%; height:auto;\" ><br><BR>\n" );
document.write( "ANSWER: 96/5 = 19.2 miles per hour<br><BR>\n" );
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