If the incentre of an equilateral triangle lies inside the triangle and its radius in 3 cm, then the side of the equilateral triangle is

A. 9$$\sqrt 3 $$ cm

B. 6$$\sqrt 3 $$ cm

C. 3$$\sqrt 3 $$ cm

D. 6 cm

Answer: Option B

Solution(By Examveda Team)

Inradius = $$\frac{a}{{2\sqrt 3 }}$$ (a = side of Δ)
3 = $$\frac{a}{{2\sqrt 3 }}$$
a = 6$$\sqrt 3 $$ cm