In 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.
Base diameter of the frame cm
Radius of the frame cm
It is given that 2.5 cm is to be given for folding decorative cloth over the top and bottom of the frame. Therefore, we will add (2.5+2.5) cm to the height of the frame.
Cloth required = Curved surface area of the frame