In a circle of radius 21 cm, an arc subtends an angle of 60∘ at the centre.
Find :
(i) the length of the arc
(ii) area of the sector formed by the arc.
In a circle of radius 21 cm, an arc subtendeds as an angle of 60∘ at the centre. Find (i) the length of the arc (ii) area of the sector formed by the arc. (Use π=227)