2 m^3 of bricks 4 m^3 of bricks 6000 m^3 of air 10,000 m^3 of air
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Red-clay bricks have a density of approximately 2000 kg/m^3. Air has a density of 1 kg/m^3. Which of the following has the lowest mass?
Possibilities:
- 2 m^3 of bricks
- 4 m^3 of bricks
- 6000 m^3 of air
- 10,000 m^3 of air

2 m^3 of bricks