If the perimeter of an equilateral triangle is 60 units, then its area is ________ unit2.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 100√3.
Each side = 60/3 = 20 units
Area = (√3/4) × side2 = (√3/4) × (20)2 = 100√3 unit2