Verified answer

Answer:

Correct option is D)

Diameter of the base of lampshade, d = 20 cm

radius r =

2

d

=

2

20

cm ;

height = 30 cm

Margin over the top and bottom = 2.5 cm + 2.5 cm = 5 cm

Hence total length of the cloth used

h = 30 cm + 5 cm

h = 35 cm

The cloth required for covering the lampshade = 2πrh = 2 X

7

22

X 10 X 35 = 2200 cm

2