Four thin metal rods, each of mass `M` and length `L`, are welded to form a square `ABCD` as shown in figure. The moment of inertia of composite structure about a line which bisects rods `AB` and `CD` is

Three thin metal rods,each of mas M and length dL,are welded to form an equilateral triangle.The moment of inertia of the composite structure about an axis passing through the centre of mas of the structure and perpendicualr to its plane is :

Four rods of equal mass m and length L . Forms a square ABCD as shown in figure. The moment of inertia of ABCD about the axis OO' passing through the point A is

Two uiform identical rods AB and CD each of mass M and length L are joined to form a cross as a shown in fig.find the moment of inertia of the cross about a bisector as shown dotted in the figure. .

Two uniform rods each of mass M and length L are joined as shown in the figure. The moment of inertia of the system about line AB is kML^(2) .Find the value of k .

A rod PQ of mass m and length L is rotated about an axis through P as shown in figure. Find the moment of inertia of the rod about the axis of rotation.