Answer:
[tex]\displaystyle \rho=1.25\ g/ml[/tex]
Explanation:
Density
The density of a substance is the mass per unit volume. The density varies with temperature and pressure.
The formula to calculate the density of a substance of mass (m) and volume (V) is:
[tex]\displaystyle \rho=\frac{m}{V}[/tex]
The cube has a mass of m=3.75 g and a volume of V=3 ml, thus the density is:
[tex]\displaystyle \rho=\frac{3.75\ g}{3\ ml}[/tex]
[tex]\boxed{\displaystyle \rho=1.25\ g/ml}[/tex]
Since 1 kg=1000 mg and 1 lt = 1000 ml, the density has the same value but with different units:
[tex]\displaystyle \rho=1.25\ kg/l[/tex]
