Question

Find the volume of the cylinder if height (h) and radius of the base (r) are as given below.
(1) r = 10.5 cm, h =8 cm
(2) r = 2.5 m, h = 7 m
(3) r = 4.2 cm, h = 5 cm
(4) r = 5.6 cm, h = 5 cm

Answer 1

Volume of the cylinder = $\mathrm{\pi }{r}^{2}h$
(1) r = 10.5 cm, h =8 cm
Volume = $\mathrm{\pi }{r}^{2}h$ = $\frac{22}{7}\times 10.5\times 10.5\times 8=2772$ cubic cm
(2) r = 2.5 m, h = 7 m
Volume = $\mathrm{\pi }{r}^{2}h$ = $\frac{22}{7}\times 2.5\times 2.5\times 7=137.5$ cubic cm
(3) r = 4.2 cm, h = 5 cm
Volume = $\mathrm{\pi }{r}^{2}h$ = $\frac{22}{7}\times 4.2\times 4.2\times 5=277.2$ cubic cm
(4) r = 5.6 cm, h = 5 cm
Volume = $\mathrm{\pi }{r}^{2}h$ = $\frac{22}{7}\times 5.6\times 5.6\times 5=492.8$ cubic cm