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# Engineering Mechanics - Moments of Inertia - Discussion

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"When ambition ends, happiness begins."
- (Proverb)
3.

The composite cross section for the column consists of two cover plates riveted to two channels. Determine the radius of gyration k with respect to the centroidal axis. Each channel has a cross-sectional area of Ac = 11.8 in.2 and moment of inertia (I )c = 349 in.4.

 [A]. k = 7.74 in. [B]. k = 6.29 in. [C]. k = 5.44 in. [D]. k = 4.25 in.

Answer: Option E

Explanation:

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