A big dumb-bell is prepared by using a uniform rod of mass 60 g and length 20 cm.Two identical solid

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A big dumb-bell is prepared by using a uniform rod of mass 60 g and length 20 cm. Two identical solid spheres of mass 50 g and radius 10 cm each are at the two ends of the rod. Calculate moment of inertia of the dumb-bell when rotated about an axis passing through its centre and perpendicular to the length.
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Thanks and book idk y arr giving a wrong answer

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