Two Cars Start Moving from the Same Point $50$ Mi/h and the Other Travels West At

Two cars start moving from the same point. One travels south at $50$ mi/h and the other travels west at $40$ mi/h. At what rate is the distance between the cars increasing 2 hours later? Round the result to the nearest hundredth.

A) $55.42 ~\mathrm{mi} / \mathrm{h}$
B) $76.43 ~\mathrm{mi} / \mathrm{h}$
C) $81.38 ~\mathrm{mi} / \mathrm{h}$
D) $65.49 ~\mathrm{mi} / \mathrm{h}$
E) $64.03~ \mathrm{mi} / \mathrm{h}$