Question

Find the (i) curved surface area (ii) total surface area and (iii) volume of a right circular cylinder whose height is 15cm and the radius of the base is 7cm.

Answer 1

Radius of the Cylinder(r) = 7cm
and height (h) = 15cm
(i) Curved surface area= $2\pi rh$
$=2\times \frac{22}{7}\times 7\times 15=660c{m}^2$
(ii) Total surface area = $2\pi r(h+r)$
$=2\times \frac{22}{7}\times 7(15+7)c{m}^2=44\times 22=968c{m}^2$
(iii) Volume = $\pi r^{2}h=\frac{22}{7}\times 7\times 7\times 15c{m}^3$
$=2310c{m}^3$