Question

Find the curved surface area and volume of the cylinder whose height is $21cm$ and area of its one end is $154c{m}^2$

Answer 1

We have,

$h=21cm$

$\pi r^2=154$

$r=7cm$

We know that the curved surface area of the cylinder

$A_c=2\pi rh$

$A_c=2\times \frac{22}{7}\times 7\times 21$

$A_c=22\times 42$

$A_c=924c{m}^2$

We know that the volume of the cylinder

$V=\pi r^{2}h$

$V=\frac{22}{7}\times 7^2\times 21$

$V=22\times 21times$

$V=3234c{m}^3$

Hence, this is the answer.