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1. If the radius of a circle is reduced by 40%, its circumference is reduced by-

  • A. 60%
  • B. 60%
  • C. 60%
  • D. 60%

Answer: Option B

Explanation:

If the radius of a circle will be reduced by 40% its circumference will also be reduced by 40% because circumference of  circle is directly dependent on radius of the circle as the formula to find the circumference is Circumference= 2πr or πd
d is diameter which is 2r

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