Question

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. kilometers

Answer 1

Given:

(i) The radius of earth is 6371 km.

(ii) A rope circles the earth perfectly.

To find:

(i) The length of the rope in terms of П.

Solution:

The length of a rope which perfectly circles a circle is equal to the perimeter of the circle.

For a circle of radius r, its perimeter is given as 2Пr.

For earth, as mentioned here that it is a circle, its radius is 6371 km.

So, its perimeter is = 2*П*6371 km

= 12742П km

This is again the length of the rope which circles the earth.

The length of the rope is 12742П km.

Answer 2

Answer:

12742

Step-by-step explanation:

the radius of the Earth is 6371, so you mutliply times 2 because you are finding the total length (diameter).