The captain of an aeroplane who is flying at an alttitude of $1200\;m$ sights two ships at an angle of depression of $60^{\circ}$ and $30^{\circ}$. The distance between the two ships is ________

Question

$\begin{array}{1 1}(A) \; 1385.6\;m \\(B)\; 1835.6\;m \\(C)\;1538.6\;m \\(D)\;1358.6\;m \end{array}$