The angle of elevation of a cloud from a point $60\;m$ above a lake is $30^{\circ}$ and the angle of depression of the lake of the cloud in the lake is $60^{\circ}$. The height of the cloud is

Question

$\begin{array}{1 1}(A) \; 60\;m \\(B)\; 180\;m \\(C)\;120\;m \\(D)\;100\;m \end{array}$