Question

Find the curved surface area and total surface area of a right circular cylinder of height $15$ cm and whose base radius is $7$ cm.

Answer 1

Radius of cylinder $\left(r\right)=7cm$
Height of cylinder $\left(h\right)=15cm$
Curved Surface Area $=2\pi rh$
$=2\times \left(22/7\right)\times 7\times 15$
$=660c{m}^2$
Total Surface Area $=2\pi r(h+r)$
$=2\times \left(22/7\right)\times 7(15+7)$
$=2\times 22\times 22$
$=968c{m}^2$