The ratio of torsional moments of resistance of a solid circular shaft of diameter D and a hollow shaft having external diameter D and internal diameter d is given by

The ratio of torsional moments of resistance of a solid circular shaft

1.	The ratio of torsional moments of resistance of a solid circular shaft of diameter D and a hollow shaft having external diameter D and internal diameter d is given by
A.	[A].
B.	[B].
C.	[C].
D.	[D].
Answer» B. [B].

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The ratio of torsional moments of resistance of a solid circular shaft of diameter D and a hollow shaft having external diameter D and internal diameter d is given by

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