Question

The diameter of the earth

at the equator is about
8.000 mi.
Based on this figure, how
far is it around the earth?

Answer 1

25,132.74 miles

Explanation:

Hello!

We are basically asked to find the circumference of the Earth's cross-section.

Circumference:
`C = 2\pi r`

We can replace 2r with the diameter, because the diameter is 2 times the radius.

Multiply the Diameter by pi:

• 
  `C = \pi D`
• 
  `C = 8000\pi`
• 
  `C = 25,132.7412287183 \approx 25,132.74`

It is around 25,132.74 miles around.