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Question

The area of the given sector, of radius 1 ft is sq. ft. (round off to 2 decimal places).
[Take ๐›‘ = 3.14]

A
2.09
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B
3.14
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C
1.31
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D
1.57
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Solution

The correct option is C 1.31
Area of cirlce = 𝛑r2
=3.14×1×1
=3.14 sq.ft

For 360° central angle, Area = 𝛑r2
For 1° central angle, Area = 𝛑r2×1360

For 150° central angle,
Area = 𝛑r2×150360

=3.14×150360

=1.308 sq.ft

=1.31 sq.ft

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