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72. A thin rod of length L and mass M is bent at the middle point O at an angle of 60 degree as shown in figure. The moment of inertia of the rod about an axis passing through O and perpendicular to the plane of the rod will be

 

 

(a)  ML2/6

(b) ML2/12

(c) ML2/24

(d) ML2/3

Ans. b

(23)

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