<PRE><B>Question 275400</B>
I flew from Pheonix to Tucson, a distance of 120 miles, at a constant speed of 120 mph,
 I then returned at a constant speed of 60 mph. 
what is my average speed, trip distance, displacement, and average velocity?
:
Let s = average speed
{{{120/120}}} + {{{120/60}}} = {{{240/s}}}
3 = {{{240/s}}}
3s = 240
s = 80 mph average speed, for 240 miles
:
You returned to your starting points so displacement = 0
Therefore the average velocity is 0 also
:
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