Correct Answer - Option 2 : 12 cm
Given
Area of equilateral triangle = 36√3 cm2
Formula used
Area of a triangle = (√3/4) × (side)2
Calculation
36√3 = (√3/4) × (side)2
⇒ 144 = (side)2
⇒ √144 = side
⇒ 12 cm = side
∴ Side of an equilateral triangle is 12 cm.