The change in the value of $g$ at a height $h$ above the surface of the earth is the same as at a depth $d$ below the surface of the earth. When both $d$ and $h$ are much smaller than the radius of the earth,then which one of the following is correct?

  • A
    $d = \frac{3h}{2}$
  • B
    $d = \frac{h}{2}$
  • C
    $d = h$
  • D
    $d = 2h$

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