What is the approximate mass of air in a living room 4.4m×3.7m×2.9m? The density of air is 1.29 kg/m3.

**Answer 1**

The volume is 4.4× 3.7 × 2.9 cubic metres.

Work this out and then multiply by 1.29.

Round to 2 significant figures and this is the answer (in kg).

**Answer 2**

mass= volume x density

mass= (4.4)x(3.7)x(2.9) x (1.29)

mass= (47.212) x (1.29)

mass= 60.9 kg

**Answer 3**

Thanks so much you guys!