Find the (i) curved surface area


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


Given :

Height, $h=15 \mathrm{~cm}$

Radius, $r=7 \mathrm{~cm}$

(i) Curved surface area, $S_{1}=2 \pi r h$

$=2 \times \frac{22}{7} \times 7 \times 15$

$=660 \mathrm{~cm}^{2}$

(ii) Total surface area, $S_{2}=2 \pi r(r+h)$

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

$=44 \times 22$

$=968 \mathrm{~cm}^{2}$

(iii) Volume of the right circular cylinder, $V=\pi r^{2} h$

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

$=2310 \mathrm{~cm}^{3}$

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