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 to be given for folding it over the top and the bottom of the frame. Find how much cloth is required for covering the lampshade
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Step-by-step explanation:
the lampshade is cylindrical in shape.
given that, d = 20cm hence r = 10cm
h = 30cm
margins are added from top and bottom hence they will add up to the height,
now, h= 30 + 2.5 + 2.5 = 35cm
area of cloth to cover the lampshade is its curved surface area(including the margins)
CSA = 2π r h
= 2 × 22/7 × 10 × 35
= 700 × 22/7 = 2200cm²
the area of cloth required is 2200cm²
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