Question

how to find radius of the earth​

Answer 1

Answer:

To get the radius of the earth, he divided the earth's circumference by 2 and pi. He got the radius to be 6,366 km. The radius of the Earth using satellites is 6371 km.

Additional information :

In the third century B.C., Eratosthenes was able to mathematically calculate the earth’s diameter by comparing differences in the angle of the sun’s rays at two separate geographic points. He noticed that the difference in the angle of a shadow in his location at Syene, which is present-day Aswan in Egypt, and that of a shadow in Alexandria was about 7.2 degrees. Since he knew the distance between the locations, he was able to determine the circumference of the earth, and therefore the diameter and radius as well. You can do this, too, by using his method.

Answer 2

The radius of earth is

6 378.1 kilometers

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