What is the radius of gyration? Write its unit and dimensional formula.

(N/A) The radius of gyration of a body about a given axis is defined as the distance from the axis of rotation to a point where,if the entire mass of the body were concentrated,its moment of inertia would be the same as the actual body.
Mathematically,$I = MK^2$,where $I$ is the moment of inertia,$M$ is the total mass,and $K$ is the radius of gyration.
Thus,$K = \sqrt{I/M}$.
Unit: The $SI$ unit of the radius of gyration is the meter $(m)$.
Dimensional formula: Since it represents a distance,its dimensional formula is $[M^0 L^1 T^0]$.