Ratio of densities of materials of two c...

Ratio of densities of materials of two circular discs of same mass and thickness `5:6` the ratio of their `M.I.` about natural axes is

`5:6`

`6:5`

`25:36`

`1:1`

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The correct Answer is:

`I = 1/2 pitR^(4) rho `

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