First we have to calculate the volume of the living room: V = L x W x H = 4.5 m * 3.4 m * 2.9 m V = 44.37 m³ We know that Density = 1.29 kg/m² D = m / V m = D · V m = 1.29 kg/m³ · 44.37 m³ m = 57.2373 kg ≈ 57.2 kg Answer: The approximate mass of air in living room is 57.2 kg.
