the frame of lampshade is to be covered with a decorative cloth. the frame has a base diameter =20 CM and height=30cm .a margin of 2.5cm is to be given for folding over the top and bottom of the frame. find how much cloth is required for covering the lampshade
Answers
Answered by
7
Correct option is
D
2200 cm
2
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
Answered by
2
Answer:
option d is correct
Step-by-step explanation:
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