Question

Mass of a body is 210g and its density is 7.981g/cm^3 what will be its volume with regard to significant figures

Answer 1

Density is mass per unit volume,

$\rho=\dfrac mV$

so to get the volume, divide the mass by the density,

$V=\dfrac m\rho$

So the volume is

$\dfrac{210\,\mathrm g}{7.981\frac{\rm g}{\mathrm{cm}^3}}\approx26.312\,\mathrm{cm}^3\approx\boxed{26\,\mathrm{cm}^3}$