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UPSC CDS Math Volume and Surface Area Questions

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Question : 26

Total: 104

A right circular cone is sliced into a smaller cone and a frustum of a cone by a plane perpendicular to its axis. The volume of the smaller cone and the frustum of the cone are in the ratio 64 : 61. Then their curved surface areas are in the ratio

4 :1
16 : 9
64 : 61
81 : 64

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