Knowing that the Moon takes 28 days to make one complete revolution around the Earth, calculate its average speed.
Datum: Consider the trajectory of the Moon as circular with a radius of 384,000 Km.
First, we change the 28 days to seconds.
Then we calculate the length of the circumference, which is the distance traveled by the Moon in its journey of 28 days. Considering R = 384,000 Km = 384,000,000 m:
Finally, we calculate the speed: