A solid sphere of mass M, radius R and h...

A solid sphere of mass `M`, radius `R` and having moment of inertia about as axis passing through the centre of mass as `I`, is recast into a disc of thickness `t`, whose moment of inertia about an axis passing through its edge and perpendicular to its plance remains `I`. Then, radius of the disc will be.

`2/(sqrt(15))R`

`2/(sqrt(5))R`

`3/(sqrt(15))R`

`sqrt(3/15)R`

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