Sum
In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. Find area of the sector formed by the arc. (Use π = 22/7)
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Solution
Area of the sector formed by the arc is given by
`(60°)/(360°) pi (21)^2`
`= 1/6xx22/7(21)^2`
`= 231`
Concept: Area of Circle
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