Question

Calculate the mass of air in a 100m of floor dimension 10m×12m and height 4m. Take density of air =1.2kg/m^3

Answer 1

By definition, the mass is:

$$m = \rho V$$

where $\rho = 1.2kg/m^3$ is the density of air, and $V$ is the volume of the floor. It is given as the product of the floor dimensions:

$$V = 10m\times 12m\times 4m = 480m^3$$

Thus, the mass is:

$$m = 1.2kg/m^3\times 480m^3 = 576kg$$

Answer. 576 kg.