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Two discs have save mass and thickness. ...

Two discs have save mass and thickness. Their materials have densities `d_1` and `d_2`. The ratio of their moments of inertia about the central aixs. will be:

A

`d_1:d_2`

B

`d_1d_2:1`

C

`1:d_1d_2`

D

`d_2:d_1`

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