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      Question

      At the centre of a circle of 20 cm radius, the angle

      made by an arc of 24(4/9) cm length is
      A 70┬░ Correct Answer Incorrect Answer
      B 75┬░ Correct Answer Incorrect Answer
      C 60┬░ Correct Answer Incorrect Answer
      D 55┬░ Correct Answer Incorrect Answer

      Solution

      Here, radius r = 20 cm, arc length s = 24(4/9) cm = 220/9 s = r╬╕ тЗТ ╬╕ = 220/(9 ├Ч 20) тЗТ ╬╕ = 11/9 rad => 11/9 ├Ч 180/╧А = 220/3.14 => 70┬░

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