An equilateral triangle ABC is cut from a thin solid sheet of wood. (see figure) D,E and F are the mid-points of its sides as shown and G is the centre of the triangle. The moment of inertia of the triangle about an axis passing through G and perpendicular to the plane of the triangle is I₀. If the smaller triangle DEF is removed form ABC, the moment of inertia of the remaining figure about the same axis is l then