if a car travels once around a 100
meters
racetrack what is its distance does it travel?
um, 100 meters
pretty small track for a car race, I would think.
Now, if it's a circular track, with a diameter of 100 meters (not the usual way of designating tracks) then the distance is 100π meters.
so how about you fix your question (and your English, and yiur text formatting) and try again?