Q14 of 157 Page 819

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

Given:

Radius of circle = 21 cm


Angle subtended by the arc = 60°


∵ Length of arc = × 2πr


= × 2 × × 21 = 22 cm


Hence, the length of the arc is 22 cm.


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