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In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. Find the length of the arc.

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In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. Find the length of the arc.

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Radius = r = 21 cm and θ = 60°

Length of the arc = θ/360 (2πr)

= 60/360 x 2 x 22/7 x 21

= 22 cm

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