The area of the base of a right circular cylinder is 616 cm
Question:

The area of the base of a right circular cylinder is 616 cm2 and its height is 25 cm. Find the volume of the cylinder.

Solution:

Let the area of the base of a right circular cylinder be $S \mathrm{~cm}^{2}$.

Given :

$S=616 \mathrm{~cm}^{2}$

Height, $h=25 \mathrm{~cm}$

Let the radius of a right circular cylinder be $r \mathrm{~cm}$.

$S=\pi r^{2}$

$616=\frac{22}{7} \times \mathrm{r}^{2}$

$\mathbf{r}^{2}=\frac{616 \times 7}{22}$

$\mathrm{r}^{2}=196$

r = 14 cm

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

$=\pi \times(14)^{2} \times 25$

$=15400 \mathrm{~cm}^{3}$

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