Question

The mass of a body is $4kg$ and its volume is $500c{m}^3$, then its relative density is _______

Answer 1

Volume of body is $500c{m}^3=500\times {10}^{-6}{m}^3$

Now we know that density $\rho =\frac{mass}{volume}$

$\rho =\frac{4}{500\times {10}^{-6}}$

$\rho =8000kg{m}^{-3}$

Now relative density ${\rho }_r=\frac{densityofobject}{densityofwater}$

${\rho }_r=\frac{8000}{1000}=8$