A disc of mass 'm' and radius R has a concentration hole of radius 'r'. Its M.I. about an axis through centre and normal to plane is

A disc of mass 'm' and radius R has a concentration hole of radius 'r'

1.	A disc of mass 'm' and radius R has a concentration hole of radius 'r'. Its M.I. about an axis through centre and normal to plane is
Answer» `m/2(R-r)^(2)` `m/2(R^(2)-r^(2))` `m/2(R+r)^(2)` `m/2(R^(2)+r^(2))` ANSWER :D