Three identical rods, each of mass `m` and length `l`, form an equaliteral triangle. Moment of inertia about one of the sides is

Options

A. `(ml^(2))/6`
B. `ml^(2)`
C. `(3ml^(2))/4`
D. `(2ml^(2))/3`

Answer

D

Explanation

`I=I_(1)+I_(2)+I_(3)=(ml^(2))/3+(ml^(2))/3+0=(2ml^(2))/3`