A circular arc with radius \(21\ cm\) subtends an angle of \(60°\) at the centre. Estimate
 
(i) the length of the arc
 
(ii) the area of the minor segment of the circle made by the corresponding chord.
 
(Use \(\pi =\frac{22}{7})\) 
 
Ans:
 
(i) \(cm\)
 
(ii) iiii \(cm^2\)