Answer :
We are given the following information.
Distance covered = 400 m
TIme taken = 36 s
We are asked to find the average speed.
Recall that the average speed is given by
[tex]s=\frac{d}{t}[/tex]Where d is the distance traveled and t is the time.
[tex]\begin{gathered} s=\frac{400}{36} \\ s=11.11\;\frac{m}{s} \end{gathered}[/tex]The average speed is 11.11 m/s