Question

Calculate the mass of a lead cylinder which is $10cm$ long and $3cm$ in diameter. Take density of lead $11.40g{cm}^{-3}$

Answer 1

Density = $\frac{mass}{volume}$

$Mass=density\times volume$

Now , volume of lead cylinder = $\pi r^{2}h$

= $\pi (\frac{3}{2}{)}^{2}10$

= $\frac{495}{7}$ $c{m}^3$

Therefore , mass of cylinder = $\frac{495}{7}$ * $11.40g$

= $806.14g$