Question

va rooog dau coroană​

Answer 1

$m=300 \ kg \\ \rho=700 \ kg/m^3 \\ \rho=\frac{m}{V} \ \Rightarrow \ V=\frac{m}{\rho} \\ V=\frac{300 \ kg}{700 \ kg/m^3} \\ \Rightarrow \boxed{V\approx 0,43 \ m^3}$