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      Question

      If the radius of a circle is given up to 19 times, how

      much of its perimeter will be the perimeter of the previous perimeter?
      A 20 Correct Answer Incorrect Answer
      B 19 Correct Answer Incorrect Answer
      C 21 Correct Answer Incorrect Answer
      D 18 Correct Answer Incorrect Answer

      Solution

      Let the radius of the circle be r cm. Circumference of the circle = 2 ฯ€r The new radius of the circle = 19 r New circumference of the circle = 2 ฯ€ ร— 19r = 38 ฯ€r Required answer = 38 ฯ€r/2 ฯ€r = 19 (times)

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