A bar magnet of magnetic moment M is placed at a distance D with...

A bar magnet of magnetic moment $M$ is placed at a distance $D$ with its axis along positive $X$-axis. Likewise, second bar magnet of magnetic moment $M$ is placed at a distance $2D$ on positive $Y$-axis and perpendicular to it as shown in the figure. The magnitude of magnetic field at the origin is \left|\overset{→}{B}\right| = \alpha\left[\dfrac{\mu0}{4\pi}\dfrac{M}{D3}\right]$. The value of$\alpha$must be (Assume$D > >$where$l$is the length of magnets)</p><p><img src="/api/proxy-image?url=https$