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Question

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A lamp shade made of a special chart paper in the form of frustums of a cone open at both ends. The radii of its ends are 16 cm. Find the cost of the paper used if one square meter of paper costs Rs. 0.70.

Solution

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Ans. Rs. 880

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2 cubes each of volume 64 cm³ are joined end to end. Find the surface area of the resulting cuboid.

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