Question

un paralelepied are masa de 210g si laturile 3 cm 4cm 2cm. din ce este confectionat paralalapied?​

Answer 1

$m=210 \ g \\ a=3 \ cm \\ b=4 \ cm \\ c=2 \ cm \\ \rho=\frav{m}{V}; \\ V=abc=3 \ cm \cdot 4 \ cm \cdot 2 \ cm=24 \ cm^3; \\ \Rightarrow \rho=\frac{210 \ g}{24 \ cm^3}=8,75 \ g/cm^3=8 \ 750 \ kg/m^3 \\ \Rightarrow \boxed{\bold{din \ cupru}}$