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      Question

      If the radius of a circle becomes ten times, how much of

      its periphery will be its circumference?
      A 9 Correct Answer Incorrect Answer
      B 8 Correct Answer Incorrect Answer
      C 11 Correct Answer Incorrect Answer
      D 10 Correct Answer Incorrect Answer

      Solution

      Let the radius of the circle be r cm. Circumference of the circle = 2Ο€r The new radius of the circle = 10r New circumference of the circle = 2 Ο€ Γ— 10r = 20Ο€r Β  Required answer = 20Ο€r/2Ο€r = 10 (times)

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