Question

The diameter of the base of a right circular cylinder is 42 cm and its height is 10 cm. Find the volume of the cylinder.

Answer 1

$$\begin{gathered} \mathrm{Given}: \\ \mathrm{Diameter},d=42\mathrm{cm} \\ \mathrm{Radius},r=\frac{d}{2}=21\mathrm{cm} \\ \mathrm{Height},h=10\mathrm{cm} \\ \mathrm{Volume}\mathrm{of}\mathrm{the}\mathrm{cylinder},\mathrm{V}=\mathrm{\pi }{r}^{\mathit{2}}h \\ =\frac{22}{7}\times {21}^2\times 10 \\ =13860{\mathrm{cm}}^3 \end{gathered}$$