A 25 cm long solenoid has radius 2 cm and 500 total number of turns. It carries a current of 15 A. If it is equivalent to a magnet of the same size and magnetization $\overrightarrow{M}$ (magnetic moment /volume), then $|\overrightarrow{M}| $ is :

Question

$\begin{array}{1 1} 3 \pi \;Am^{-1} \\ 30000\;Am^{-1} \\ 300\;Am^{-1} \\ 30000\;\pi Am^{-1} \end{array} $