(i) Given,
D = 21 cm
r = \(\frac{d}{2}\) = \(\frac{21}{2}\) cm
h = 10 cm
Volume of cylinder = πr2h = \(\frac{22}{7}\)x \(\frac{21}{2}\)x \(\frac{21}{2}\)x 10 = 3645 cm3
(ii) Given,
d = 7 m
r = \(\frac{7}{2}\) m
h = 24 m
Volume of cylinder = πr2h = \(\frac{22}{7}\)x \(\frac{7}{2}\)x \(\frac{7}{2}\)x 24 = 924 m3