Three particles, each of mass m gram, are situated at the

Three particles, each of mass m gram, are situated at the vertices of an equilateral triangle ABC of side l cm (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram-cm² units will be

I_AX = m(AB)² + m(OC)²
= ml² + m (l cos 60º)²
= ml² + ml²/4 = 5/4 ml²

3	Ml²
2

3	Ml²
4

5	Ml²
4