In the figure,you see the frame of a lampshad | vedclass

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(C) The frame of the lampshade is cylindrical in shape.Given:Diameter of the base $= 20 \, cm$,so the radius $(r) = \frac{20}{2} = 10 \, cm$.Height of

Vedclass · Accepted Answer

$2200$

Vedclass · Answer

(C) The frame of the lampshade is cylindrical in shape.Given:Diameter of the base $= 20 \, cm$,so the radius $(r) = \frac{20}{2} = 10 \, cm$.Height of the frame $= 30 \, cm$.Margin for folding at the top and bottom $= 2.5 \, cm$ each.Total height $(h)$ of the cloth required $= 30 \, cm + 2.5 \, cm + 2.5 \, cm = 35 \, cm$.The cloth required to cover the lampshade is equal to the curved surface area of the cylinder.Curved Surface Area $= 2 \pi rh$$= 2 	imes \frac{22}{7} 	imes 10 	imes 35 \, cm^2$$= 2 	imes 22 	imes 10 	imes 5 \, cm^2$$= 2200 \, cm^2$.Thus,$2200 \, cm^2$ of cloth is required to cover the lampshade.

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