An annular ring has mass $10 \ kg$ and inner and outer radii are $5 \ m$ and $10 \ m$ respectively. Its moment of inertia about an axis passing through its centre and perpendicular to its plane is

  • A
    $525 \ kg \cdot m^2$
  • B
    $625 \ kg \cdot m^2$
  • C
    $525 \ g \cdot cm^2$
  • D
    $625 \ g \cdot cm^2$

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