Correct Answer: 225√3 sq cm
Explanation:
Given that, perimeter = 90 cm ⇒ 3a = 90 cm [a = side] ∴ a = 90/3 = 30 cm ∴ Area = √3a2 / 4 = √3/4 x (30)2 = 900 x √3/4 = 225√3 sq cm
