Answer:
8π.
Explanation:
The wheel's radius is 40 cm, so the perimeter of the wheel is 80π cm. ( because perimeter equals 2 * radius * π )
According to the formula :
distance = speed * time
We can know that the distance is perimeter of the wheel ( because when the wheel completes a rotation, it also goes forward a distance of the perimeter ) , now we got : 80π = speed * 10,
so the answer is 8π.
