A hand fan is made up of cloth fixed in between the metallic wires. It is in
the shape of a sector of a circle of radius 21 cm and of angle 120° as
shown in the figure. Calculate the area of the cloth used and also find the
total length of the metallic wire required to make such a fan.
120°
21 cm
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Answer:
Step-by-step explanation:
Area of cloth = 120/360×Π×r^2
=462cm^2
Length of wire=r+r+120/360×2×Π×r
=86 Cms
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