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The table lists four cones. Which has the greatest curved surface area?

Class 9Surface Area of a ConeMensuration
  • AA
  • BB
  • CC
  • DD

Step-by-Step Solution

CSA = πrl: A = 36π, B = 30π, C = 39π, D = 35π. C is largest even though its radius is smallest.
Answer: C) C

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