The time period of a satellite,revolving above earth's surface at a height equal to $R$ will be (Given $g = \pi^2 \ m/s^2$,$R =$ radius of earth).

  • A
    $\sqrt{4 R}$
  • B
    $\sqrt{8 R}$
  • C
    $\sqrt{32 R}$
  • D
    $\sqrt{2 R}$

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