The figure below shows a rope that circles the Earth. The radius of the Earth is 6371 kilometers. Assuming the rope makes a perfect circle, what is the length of this rope? Give your answer in terms of pi.

since the circumference of a circle is the outer length, that'd be the same as the rope. The circumference formula is 2πr where r is the radius so your answer would be 12742π which is roughly 40030.17 kilometers.