ANSWERS: 3
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Can't say exactly. I am sure some scientist knows, but the radius from the center of the earth to the surface varies, because the earth is not a perfect sphere.
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About 3,963 miles. Answer in Google.
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I ran around the outside, took note of how long it took me. Then I measured the circumfrence? divided it by the time it took me to run around the outside, adjusting the times to meet the local time, deducting stops for natural thingies. After a lot of consideration, I took the circumfrence of the globe, divided it by two and found the true measurement. I will wait until I see the other answers before telling you mine.
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