Find the volume of a cylinder, if the diameter (d) of its base and its altitude (h) are :
(i) d = 21 cm, h = 10 cm
(ii) d = 7 m, h = 24 m
(i) Given,
D =21cm
r = 
h = 10 cm
Volume of cylinder = 
(ii) Given,
d = 7 m
r = 
h = 24 m
Volume of cylinder = 
2