If a disc of mass m and radius r is reshaped into a ring a radius 2r,the mass remaining the same, the radius of gyration about centroidal axis perpendicular to plane goes up by a factor of `sqrt(x)` . Find the value of x.

If a disc of mass m and radius r is reshaped into a ring a radius 2r,t

1.	If a disc of mass m and radius r is reshaped into a ring a radius 2r,the mass remaining the same, the radius of gyration about centroidal axis perpendicular to plane goes up by a factor of `sqrt(x)` . Find the value of x.
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If a disc of mass m and radius r is reshaped into a ring a radius 2r,the mass remaining the same, the radius of gyration about centroidal axis perpendicular to plane goes up by a factor of `sqrt(x)` . Find the value of x.

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