Calculate the density of an object with a mass of 2.3 kg and a volume of 1.2 m³.

A graduated cylinder has 20 cm³ of water. We put a 280 g object into the water. The object sinks, and the water level goes up to 25 cm³. Calculate the density of the object.

Calculate the density of an object with a mass of 500 g. It displaces 220 cm³ of water.