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Both the radius and the slant height of a cone are doubled. By what factor does the curved surface area change?

Class 9Surface Area of a ConeMensuration
  • A2 times
  • B6 times
  • C8 times
  • D4 times

Step-by-Step Solution

New CSA = ππ. So it becomes 4 times. (8 times would be the change in volume when every length doubles.)
Answer: D) 4 times

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