Two rings have their moemnts of inertia in the ratio of 4:1 and their diameters are in the ratio of 4:1. Find the ratio of their masses.

Explanation

`(I_(1))/(I_(2))=(M_(1)R_(1)^(2))/(M_(2)R_(2)^(2))`
`implies(M_(1))/(M_(2))=(I_(1))/(I_(2))=[(R_(2))/(R_(1))]^(2)`
`=4/1xx(1/4)^(2)`
`=4//1/16=1/4`