A sector of a circle of radius 9cm subtends angle 120° at the centre of the circle. Find the area of the sector to the nearest cm(^2) [Take π = 22/7]
-
A.
75cm2 -
B.
84cm2 -
C.
85cm2 -
D.
86cm2 -
E.
95cm2
Correct Answer: Option C
Explanation
Area of a sector = θ/360 x πr(^2)
= 120/360 x 22/7 x 81/1
= 84.86 cm(^2)
(approxeq) 85cm(^2) (to the nearest cm)