. Density is a value for mass, such as kg, divided by a value for volume, such as m3. Density is a physical property of a substance that represents the mass of that substance per unit volume. To calculate the density of mars, we need its mass and its volume. We calculate as follows:
mass of Mars = 6.40 × 10^23 kg
volume of Mars = 4πr³ / 3 (assuming the planet is a sphere)
r = 3395 km = 3395000 m
= 4π(3395000 m)³ / 3
= 1.64 x 10^20 m^3
Density = mass / volume
Density = 6.40 × 10^23 kg / 1.64 x 10^20 m^3
Density = 3904.56 kg/m^3
Therefore, the density of the planet Mars is 3904.56 kg/m^3.