Find the approximate cost of building a hollow cone of uniform thickness and having a solid base, with inner diameter 1 m, outer diameter 1.2 m and inner height
2 m assuming the cost of building material to be Rs.2 x 10^-3 /cubic cm.
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The curved surface area of the frustum come is 2904 mm square. Explanation: Given : Frustum of cone whose bigger diameter 12 cm and smaller diameter 6 mm and slant height 14 mm
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