Two circular discs A and B of same mass and same thickness are made...

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Two circular discs A and B of same mass and same thickness are made of two different metals whose densities are \( d_{A} \) and \( d_{B}\left(d_{A}d_{B}\right) \). Their moments of inertia about the axes passing through their centres
\( \mathrm{P} \) of gravity and perpendicular to their planes are \( \mathrm{I}_{\mathrm{A}} \) and \( \mathrm{I}_{\mathrm{B}} \). Which is greater \( \mathrm{I}_{\mathrm{A}} \) or \( \mathrm{I}_{\mathrm{B}} \) ?

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