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A cylinder of given material has a const...

A cylinder of given material has a constant mass M. Find the ratio of its length 'l' to the radius R when the M.I of the cylinder about its axis passing through its centre and normal to its length is minimum L

A

`sqrt(3):sqrt(2)`

B

`sqrt(2):1`

C

`sqrt(3):1`

D

`2:sqrt(3)`

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