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Question -

The perimeter of a certain sector of a circle of radius 5.6 cm is 27.2 m. Find the area of the sector.



Answer -

Radius of the sector (r) = 5.6 cm
and perimeter of the sector = 27.2 cm
∴ Length of arc = Perimeter – 2r
= 27.2 – 2 x 5.6
= 27.2- 11.2= 16.0 cm
∴ θ be the angle at the centre, then

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