The area of circle is 81 pi sq cm.Find the length of the arc subtending an
angle of 300° at the centre and also the
area of the corresponding sector.
(11th std question)
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Answer:
πr 2 = 81π, r2=81π/π=81,
r2=v81, r =9cm
length of arc=x2πr/36o=3oox2x22/ 360x7=16971.43cm
Area of Sector = Xπr 2/360
= 300x22x9^2/360=76371.43cm2
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