Question

what is radius of earth ​

Answer 1

Answer:

Its equatorial radius is 6378 km, but its polar radius is 6357 km - in other words, the Earth is slightly flattened. Eratosthenes was measuring the polar radius, and his value (using the 0.15 km/stadium conversion) lies between the polar and equatorial values.

Answer 2

Answer:

6,371 km.

Explanation:

Earth's equatorial radius is 6378 kilometre but its polar radius is 6357 kilometre - in other words the earth is slightly flattened. Erathosthenes was measuring the polar radius and his value lies between the polar and equatorial values.

Hope it helps :)