The radius of earth is

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4.6 \times 10^{6} m

6.4 \times 10^{8} m

6.4 \times 10^{6} m

answer is A.

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Detailed Solution

The average radius of the earth is 6400km.

$1 k m = 1000 m$

$∴ R = 6.4 \times 10^{6} m$

The shape of the earth is not a perfect sphere. Therefore, the radius of the earth is also different at the pole and equator. The radius is the smallest at the pole and largest at the equator.

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