Two poles, $A B$ of length two metres and $C D$ of length twenty metres are erected vertically with bases at $B$ and $D$. The two poles are at a distance not less than twenty metres. It is observed that $\tan \angle A C B = 2 / 77$. The distance between the two poles is\\
(A) $72 m$\\
(B) 68 m\\
(C) 24 m\\
(D) 24.27 m