Exercise 1 solution

Density = mass / volume = 540 g / 200 cm3 = 2.7 g/cm3.

Convert: 1 g/cm3 = 1,000 kg/m3, so 2.7 g/cm3 = 2,700 kg/m3.

The table gives aluminium as 2,700 kg/m3, so the metal is consistent with aluminium. (A density match suggests the metal but does not prove it; other materials can have similar densities.)

The arithmetic was checked with Python (540 / 200 = 2.7; 2.7 x 1000 = 2700).