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      Question

      The area of a sector of a circle is 88cm² and the angle

      of the sector is 60º. Find the radius of the circle.
      A 2 √42cm Correct Answer Incorrect Answer
      B 8√42cm Correct Answer Incorrect Answer
      C 2 √31cm Correct Answer Incorrect Answer
      D 2 √21cm Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      The area of a sector of a circle = θ/360º × πr² =88 (60º/360 º) ×22/7 × r² = 88 r² = 28×6= 168 r = 2 √42cm

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