Given:
Earth's equator is a circle with a radius of 6378km.
We will find the circumference using the following formula:
[tex]circumference=2\pi r[/tex]Substitute r = 6378 km, and π = 3.14
[tex]circumference=2*3.14*6378=40,053.84[/tex]So, the answer will be circumference = 40,053.84 km
