Answer: The density is 20 g/ml
Explanation:
Density is defined as the mass contained by a substance per unit volume.
To calculate the density, we use the equation:
[tex]\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}[/tex]
Mass of box = 400 g
Volume of box = 20 mL
Putting values in above equation, we get:
[tex]\text{Density of box}=\frac{400g}{20mL}\\\\\text{Density of box}=20g/ml[/tex]
Thus the density is 20 g/ml
