In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. What is the length of the arc (in cm)?
In a circle of a radius 21 cm, an arc subtends an angle of 60∘ at the centre. Find the length of the arc.
In a circle of radius 21 cm, an arc subtends an angle of 60∘ at the centre. The length of the arc is
(a) 21 cm (b) 22 cm (c) 18.16 cm (d) 23.5 cm