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      Question

      The area of an equilateral triangle is 400√3 sq m. Its

      perimeter is 
      A 120 m Correct Answer Incorrect Answer
      B 180 m Correct Answer Incorrect Answer
      C 24 m Correct Answer Incorrect Answer
      D 12 m Correct Answer Incorrect Answer

      Solution

      Area of an equilateral triangle = √3/4 a2 =400√3 or a2   =1600 or a = 40m so perimeter of the ∆ = 3a = 3 × 40 =120m

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