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The arc AB of the circle with centre at ...

The arc AB of the circle with centre at 'O' and: radius 10 cm has length 16 cm, What is the area of the sector bounded by the radii OA, OB and the arc AB ?

A

A) `40 pi` square cm

B

B) ` 40` square cm

C

C) `80` square cm

D

D) `20pi` square cm

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