In the given figure, you see the frame of a lampshade. It is to be covered with a decorative cloth. The frame has a base diameter of 20 cm and height of 30 cm. A margin of 2.5 cm is to be given for folding it over the top and bottom of the frame. Find how much cloth is required for covering the lampshade.

`["Assume "pi=22/7]`

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#### Solution

Height (*h*) of the frame of lampshade = (2.5 + 30 + 2.5) cm = 35 cm

Radius (*r*) of the circular end of the frame of lampshade = (20/2)cm = 10cm

Cloth required for covering the lampshade** = **2π*rh*

`=(2xx22/7xx10xx35)cm^2`

*= *2200 cm^{2}

Hence, for covering the lampshade, 2200 cm^{2} cloth will be required.

Concept: Surface Area of Cylinder

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