Answer:
76.4 m
Step-by-step explanation:
The race track has two straights and two semi circles.
Each straight is 80m
total perimeter for the straights is 80 * 2 = 160m
two semi circles which creates a full circle
perimeter of a full circle = [tex]\pi[/tex] d
NB : (d) is the diameter
therefore we can find the value of the diameter
400 = 160 + [tex]\pi[/tex] d
400- 160 = [tex]\pi[/tex]d
240 = [tex]\pi[/tex]d
d = 240/[tex]\pi[/tex]
d = 76.394.....
d = 76.4 m
