In a circle of radius 21 cm, an arc subtendeds as an angle of $60^{\circ}$ at the centre. Find (i) the length of the arc (ii) area of the sector formed by the arc. (Use $π = \frac{22}{7}$ )

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Solution

Radius (r) of circle = 21 cm
Angle subtended by the given arc = 60°
Length of an arc of a sector of angle θ =

Length of arc =

= 22 cm
Area of sector =

=231 cm²

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