Given data:
* The total distance traveled by the sprinter is d = 400 m.
* The total time taken in the given case is t = 52 seconds.
Solution:
The speed in the given case is,
[tex]s=\frac{\text{total distance traveled }}{\text{total time taken}}[/tex]Substituting the known values,
[tex]\begin{gathered} s=\frac{400}{52} \\ s=7.69\text{ m/s} \\ s\approx7.7\text{ m/s} \end{gathered}[/tex]Thus, the speed of the sprinter is 7.7 m/s.
Hence, option B is the correct answer.
