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Q.

The radius of a circle is 7cm, then what is the area of the sector of this circle if the corresponding angle is 210°?


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a

88.83 cm2

b

87.83 cm2

c

89.83 cm2

d

86.83 cm2  

answer is C.

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Detailed Solution

Given, radius of the circle is 7 cm.
Area of a sector of a circle of radius 'r' and angle =θ360°πr2 .
Hence, the area of the sector = 210°360°(π)(7)2.
⇒ The area of the sector =89.83 cm2
Hence, option 3 is correct.
 
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