In the given figure, ABC is an equilateral triangle. Two circles of radius 4 cm and 12 cm are inscribed in the triangle. What is the side (in cm) of an equilateral triangle?

A

$$\frac{32}{\surd3}$$

B

$$32\surd3$$

C

$$\frac{64}{\surd3}$$

D

$$64\surd2$$