document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=665333>Question 665333</A>: <I><SPAN STYLE=\"word-break: break-all;\"> bob's work is 40 miles away from his home. His average mph to work is 20. his average mph from work to his home is 40 mph what is the average mph for the whole trip\r<BR>\n" );
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document.write( "At first i thought it was 30, but then i thought it was a trick question because it takes 2 hours for bob to get to work and only takes 1 hour for bob to get home from work </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #413806 by </B><A HREF=/tutors/aboutme.mpl?userid=MathTherapy><B>MathTherapy(10555)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=MathTherapy><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=MathTherapy><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=413806\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <BR>\n" );
document.write( "The most important thing to note here is that:<BR>\n" );
document.write( "Average speed equals total distance, divided by total time\r<BR>\n" );
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document.write( "Since each trip is 40 miles, then total distance for entire trip = 2 * 40, or 80 miles\r<BR>\n" );
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document.write( "Since his speed for 1st part of trip (home to work, which is 40 miles) is 20 mph, then it took him <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40%2F20 ALIGN=MIDDLE  ALT=\"40%2F20\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or 2 hours to get to work\r<BR>\n" );
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document.write( "Since his speed for 2nd part of trip (work to home, which is 40 miles) is 40 mph, then it took him <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=40%2F40 ALIGN=MIDDLE  ALT=\"40%2F40\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or 1 hour to get back home\r<BR>\n" );
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document.write( "Applying the formula, we now get average speed as: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=80%2F%282+%2B+1%29 ALIGN=MIDDLE  ALT=\"80%2F%282+%2B+1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=80%2F3 ALIGN=MIDDLE  ALT=\"80%2F3\"   DISABLED_style= \"max-width:90%; height:auto;\" >, or <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=highlight_green%2826%262%2F3%29 ALIGN=MIDDLE  ALT=\"highlight_green%2826%262%2F3%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > mph\r<BR>\n" );
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document.write( "Send comments and “thank-yous” to “D” at MathMadEzy@aol.com  </SPAN>\n" );
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