To calculate the density of the object, we need to use the formula:
Density = Mass / Volume
Given that the mass of the object is 120g and it displaces a volume of 20cm3, we can substitute these values into the formula:
Density = 120g / 20cm3
Simplifying this, we find:
Density = 6g/cm3
Therefore, the density of the object is 6g/cm3.