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Question

Calculate the area of the shaded region in the figure given in cm2.



A

469.3

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B

281.2

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C

1120.4

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D

2499.7

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Solution

The correct option is A

469.3


Area of outer sector
=140360×π×20×20 
                                 
Area of inner sector
=140360×π×4×4

Area of shaded region = Outer sector - Inner sector

=140π360(40016)

=718×227×384=469.3 cm2


Mathematics

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