Engineering Board Exam Reviewer · Solid Geometry: Cones, Spheres, and Frustums · medium
Find the lateral surface area of a right circular cone of radius 5 and height 12.
- 60 π 188.5
- 130 π 408.41
- 90 π 282.74
- 65 π 204.2
Answer
D. 65 π 204.2
Solution
The slant height is sqrt(52+122)=13. L=π rl=π(5)(13)=65π 204.20.
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