The velocity of an object is a vector quantity that includes both magnitude and direction. In this case, since the car is moving around an oval track, we need to consider its direction of motion.
If the car is moving at a constant speed of 20 km/h around the track, we need to determine its velocity vector. To do this, we need to specify both the magnitude (speed) and the direction of the velocity.
However, without additional information, such as the shape of the oval track or the specific direction of the car's motion (clockwise or counterclockwise), we cannot determine the velocity vector of the car.
In summary, while we know the car's speed is 20 km/h, we cannot determine the complete velocity vector without more specific information about the car's direction of motion around the oval track.