A spherical body is symmetrical about its perpendicular axis. According to Routh's rule, the moment of inertia of a body about an axis passing through its centre of gravity is (where, M = Mass of the body, and S = Sum of the squares of the two semi-axes.)

• A. MS/5
• B. MS/3
• C. MS/4
• D. None of these

Answer: (A)