Four point masses, each of value $m$, are placed at the corners of a square $ABCD$ of side $\ell$. The moment of inertia through $A$ and parallel to $BD$ is (1) $m\ell^2$ (2) $2m\ell^2$ (3) $3m\ell^2$ (4) $3m\ell^2$
Four point masses, each of value $m$, are placed at the corners of a square $ABCD$ of side $\ell$. The moment of inertia through $A$ and parallel to $BD$ is\\
(1) $m\ell^2$\\
(2) $2m\ell^2$\\
(3) $3m\ell^2$\\
(4) $3m\ell^2$