Four rings each of mass M and radius R are arranged as shown in the figure. The moment of inertia of the system about YY' will be

Options

A. `3 MR^(2)`
B. `(3)/(2)MR^(2)`
C. `5 MR^(2)`
D. `(7)/(2)MR^(2)`

Answer

D

Explanation

`I=I_(1)+I_(2)+I_(3)`
implies `(MR^(2))/(2)+(3MR^(2))/(2)+(3MR^(2))/(2)`
implies `(7MR^(2))/(2)`