Respuesta :

Answer:

The radius is 63.69.

Step-by-step explanation:

Given:

The circumference of a circular track is 400.

Now, to find the radius:

So, to get the radius(r) we put the formula of circumference:

[tex]Circumference=2\pi r[/tex]

⇒ [tex]400=2\times 3.14\times r[/tex]

⇒ [tex]400=6.28\times r[/tex]

Dividing both sides by 6.28 we get:

⇒ [tex]63.69=r[/tex]

⇒ [tex]r=63.69[/tex]

Therefore, the radius is 63.69.