Question

What is the circumference of the earth in km?

Answer 1

`40,074.16` `km`

Explanation:

The earth has a diameter of `12,756` `km`.

Circumferenceis `pid`

`=pi(12,756)`

`=40074.1558892`

`=40,074.16` `km`

http://giphy.com/gifs/earth-FrOlhISiIhAFa