Question

A solid cylinder has a radius of $2cm$ and a length of $7cm.$. It has a density of $3.1g/c{m}^3$$.$ What is the mass of the cylinder $?$

Answer 1

We know that ;

Mass of the cylinder $\left(m\right)$$=$ volume density$\times$density

Now, density $=3.1g/c{m}^3$

and, volume of the cylinder $\mathbf{=}\mathit{\pi }{\mathit{r}}^{\mathbf{2}}\mathbf{h}$

$$\begin{gathered} =3.14\times 2^2\times 7c{m}^3 \\ =87.92c{m}^3 \end{gathered}$$

So, mass of cylinder $=87.92\times 3.1g$

$=272.522g$