Iftwo circular discs of same weight and thickness are made from metals having different densities, which disc will have large MI about its central axis?

Iftwo circular discs of same weight and thickness are made from metals

1.	Iftwo circular discs of same weight and thickness are made from metals having different densities, which disc will have large MI about its central axis?
Answer» Solution :The MI of circulardisc I = `1/2MR^2`, and its MASS M=`piR^2 times dx times RHO`, where R=radius, dx= thickness and `rho` = DENSITY. As M and dx are same , DISC with smaller density will have LARGER R and hence larger MI.