An element X (atomic wt. =125) crystallises is simple cubic structure. If diameter of the largest atom which can be placed without disturbing unit cell is $366\;pm$. Find the density of pure element X in $gm/cm^3$ [Given ,$N_A=6 \times 10^{23}]$

Question

$\begin{array}{1 1} 0600 \\ 50 \\ 300 \\ 0500 \end{array} $