Lamp shade

A lampshade is in the form of a frustum of a cone with a slant height of 7 inches and base radii of 3 inches and 7 inches respectively. How much material is used in its construction if 1/4 inch is allowed for the seam?

Your answer:

in2


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solid geometryplanimetryUnits of physical quantitiesGrade of the word problem

 
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