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The perimeters (circumferences) of the two ends of a frustum are 18 cm and 6 cm and its slant height is 4 cm. Its curved surface area (in ) is:

Class 10Frustum of a ConeMensuration
  • A48
  • B24
  • C12
  • D96

Step-by-Step Solution

CSA = *(sum of perimeters)*. (Equivalently π* since 2*π**π*)
Answer: A) 48

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