We have the next information
d=8 laps
t=18 min
v=?
First we need to have the total distance in meters
1 laps = 1/4 mile
8 laps =2 miles
1 mile =1609.34 m
2 miles =3218.69m
d=3218.69m
then we need to transform
1min=60seg
18 min- 1080 seg
Then we have the formula to calculate the velocity
[tex]v=\frac{d}{t}[/tex]we substitute the variables
[tex]v=\frac{3218.69}{1080}=2.98\text{ m/s}[/tex]