Q.

The moment of inertia of composite rod about an axis perpendicular to its length and passing through its centre is

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a

m1+m2I123+l223

b

m1+m2l1212+I2212

c

m1+m2I1+I2212

d

m1l123+m2l223

answer is D.

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Detailed Solution

112m1l12+m1l122+112m2l22+m2I222=13m1l12+13m2l22
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