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Q.

The area of a sector of a circle with radius 21 cm and angle 30°  is

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a

110cm2

b

120cm2

c

110.5cm2

d

115.5cm2

answer is A.

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Detailed Solution

Area( sector)

=x360×πr2

=30360×227×21×21

=22×214

=2312

=115.5cm2

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The area of a sector of a circle with radius 21 cm and angle 30°  is