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Consider two uniform discs of the same t...

Consider two uniform discs of the same thickness and different radii `R_(1)=R` and `R_(2)=alphaR` made of the same material. If the ratio of their moments of inertia `I_(1) and I_(2)`, respectively, about their axes is `I_(1):I_(2)=1:16` then the value of `alpha` is :

A

2

B

`sqrt2`

C

`2sqrt2`

D

4

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