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      Question

      If the radius of a circle becomes 15 times, then how

      much of its circumference will be the previous perimeter?
      A 15 Correct Answer Incorrect Answer
      B 16 Correct Answer Incorrect Answer
      C 17 Correct Answer Incorrect Answer
      D 14 Correct Answer Incorrect Answer

      Solution

      Let the radius of the circle be r cm. Circumference of the circle = 2πr New radius of the circle = 15r New circumference of the circle = 2 π × 15r = 15 × 2πr New circumference will be 15 times of its original circumference.

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