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

Radius of circle = R = 21 cm


Angle subtended by arc = 60°


Length of an arc of a sector of angle of a circle with radius R


= Circumference of circle × θ/360


=


Length of arc = 2 × 22/7 × 21 × θ/360 cm = 22 cm


Length of arc = 22 cm


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