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A lampshade is made by cutting the top o...

A lampshade is made by cutting the top of a hollow cone by a plane parallel to its base. The radii of the top and the base of the shade are 4 cm and 12 cm and the height of the shade is 6 cm. Find the area of the curved surface of the lampshade.

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MBD-Surface Areas And Volumes -Excercise
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