- Aπ*l*(R + r)
- Bπ*l*(R - r)
- C
- D2*π*l*(R + r)
Step-by-Step Solution
The curved surface area of a frustum is π*l*(R + r), where l is the slant height.
Answer: A) π*l*(R + r)
The curved (lateral) surface area of a frustum of a cone with radii R, r and slant height l is:
Class 10Frustum of a ConeMensuration
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