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UPSC CDS I 2025 Mathematics Paper

Question Numbers: 51-52
A frustum of a right cone has a top of diameter 2k, bottom of diameter 2·5k and height k.

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Question Numbers: 51-52
A frustum of a right cone has a top of diameter 2k, bottom of diameter 2·5k and height k.
What is the whole surface area of the frustum?

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