Find the volume of a cylinder whose

(i) Given :

$r=3.5 \mathrm{~cm}, h=40 \mathrm{~cm}$

Volume of cylinder, $\mathrm{V}=\pi r^{2} h$

$=\frac{22}{7} \times(3.5)^{2} \times 40$

$=1540 \mathrm{~cm}^{3}$

(ii) Given :

$r=2.8 \mathrm{~m}, h=15 \mathrm{~m}$

Volume of cylinder, $\mathrm{V}=\pi r^{2} h$

$=\frac{22}{7} \times(2.8)^{2} \times 15$

$=369.6 \mathrm{~m}^{3}$