question_answer

From a disc of radius R and mass M, a circular hole of diameter R, whose rim passes through the centre is cut. What is the radius of gyration of the remaining part of the disc about a perpendicular axis, passing through the centre?

A) \[\frac{13}{2}R\]

B) \[\sqrt{\frac{13}{16}R}\]

C) \[\frac{11}{3}R\]  

D) \[\sqrt{\frac{13}{9}R}\]