Question
If the radius of a circle becomes 15 times, then how
much of its circumference will be the previous perimeter?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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