The Average Speed of the runner is 6.25 meters per second. (Answer: D)
The Average Speed of the runner ([tex]\vec v[/tex]), in meters per second, is the Travelled Distance ([tex]s[/tex]), in meters, divided by Time ([tex]t[/tex]), in seconds. We substitute all variables and calculate the result. Please notice that a minute equals 60 seconds.
If we know that [tex]s = 3000\,m[/tex] and [tex]t = 480\,s[/tex], then the average speed of the runner is:
[tex]\bar v = \frac{x}{t}[/tex] (1)
[tex]\bar v = \frac{3000\,m}{480\,s}[/tex]
[tex]\bar v = 6.25\,\frac{m}{s}[/tex]
The Average Speed of the runner is 6.25 meters per second. (Answer: D)
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