Question

9.What is the radius of the earth?​

Answer 1

Answer:

All three values are about 6,371 kilometres (3,959 mi).

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Explanation:

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Answer 2

Answer:

6,371 km

Earth/Radius

According to data taken by 183 high-school classes participating in a World Year of Physics project, "Measure the Earth with Shadows", the radius of Earth is 6563 km, compared to the accepted value for the mean radius of 6371 km. Of course, no one is claiming the size of Earth has actually changed.