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  1. The mean radius of the earth is approximately

    2. A.

     32,000 km
    B.

     6,400 km
    C.

     9,600 km
    D.

     12,800 km

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    Answer : Option B

    Explanation :

    The Earth's mean radius is determined as the average distance from the physical center to the surface, based on a large number of samples. The value, symbolized rearth, is equal to approximately 6,371,000 meters (6.371 x 106 m). This is roughly 6,371 kilometers (km) or 3,960 statute miles.

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