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A 15m tall pillar consists of two parts. The diameters of the base at the bottom and the top-most circular disc are in the ratio 4:3. If the total area of the curved surfaces of both the parts of...

Students of a class were when asked to make cones from sheets of paper, cones made by I and J had ratio of the curved surface areas equal to 3:4. If the slanting heights of both the cones were equal,...

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