A rectangular cross-section has a width b = 10 mm and a height h = 20 mm. What will be the area moment of inertia of this rectangular section about a horizontal axis passing through its centroid (C.G.)?

Determine the mass moment of inertia of three identical uniform rods (each of mass m and length l) arranged to form an equilateral triangle, about an axis perpendicular to the plane of the triangle and passing through its centroid.

Determine the mass moment of inertia of three identical rods (each of mass m and length l) arranged to form an equilateral triangle, about an axis perpendicular to the plane of the triangle and passing through its centroid.