Question

The figure below shows a rope that circles the Earth. The radius of the Earth is

6371
63716371 kilometers.
Assuming the rope makes a perfect circle, what is the length of this rope?
Give your answer in terms of pi.

Answer 1

The circumference of a circle can be calculated using the formula:

Circumference = 2πr

Where r is the radius of the circle.

Plugging in the value for the radius of the Earth, we have:

Circumference = 2π(6371 km) = 12,742 km

So the length of the rope, assuming it makes a perfect circle around the Earth, would be 12,742 km = 2π(6371) kilometers.

Explanation: