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13 March, 01:44

The radius of the earth is 6370 kilometers. How many kilometers would you have to travel if you went around the earth with its equator?

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  1. 13 March, 02:13
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    If we were to take a cross-section of our planet on the equator we would get a circle. So, basically, the circumference of this circle is the distance one would have to travel to go around the earth. The formula for the circumference of the circle is 2 x r x pi. Radius of the Earth is r, and pi is approximately 3.1415. So, the circumference is 2 x 6370 x 3.1415, which equals to 40 029 km, or approximately 40 thousand kilometers.
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