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      Question

      If the perpendicular from a vertex of an equilateral

      triangle to the opposite side is 15√3 cm, find its inradius.
      A 4√3 cm Correct Answer Incorrect Answer
      B 3√3 cm Correct Answer Incorrect Answer
      C 5√3 cm Correct Answer Incorrect Answer
      D 12√3 cm Correct Answer Incorrect Answer

      Solution

      ATQ,

      Altitude = (√3a/2)

      β‡’ (√3a/2) = 15√3

      β‡’ a = 30 cm

      Inradius = a / (2√3) = 30 / (2√3) = 15 / √3 = 5√3 cm

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