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 $?$

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Solution

## We know that ;Mass of the cylinder $\left(m\right)$$=$ volume density$×$densityNow, density $=3.1g/c{m}^{3}$and, volume of the cylinder $\mathbf{=}\mathbit{\pi }{\mathbit{r}}^{\mathbf{2}}\mathbf{h}$ $=3.14×{2}^{2}×7c{m}^{3}\phantom{\rule{0ex}{0ex}}=87.92c{m}^{3}$So, mass of cylinder $=87.92×3.1g$ $=272.522g$

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