A geostationary satellite is orbiting the earth at a height of $6\, R$ from the earth’s surface ($R$ is the earth’s radius ). What is the period of rotation of another satellite at a height of $2.5\, R$ from the earth’s surface

  • A

    $6\sqrt 2 \,hours$

  • B

    $10\, hours$

  • C

    $\frac{{5\sqrt 5 }}{{\sqrt 3 }}\,hours$

  • D

    none of the above

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