Plan A: If we assume that there are 8 billion people who weigh an average of 100kg and have roughly the density of water then everyone would easily fit into a one kilometer cube.
Plan B: If we seek out the most densely populated city in the world and we all lived like that then everyone would fit into Oklahoma.
Plan C: If they all stood up as if in a lift they would all fit into Rhode Island.
Plan A: If we assume that there are 8 billion people who weigh an average of 100kg and have roughly the density of water then everyone would easily fit into a one kilometer cube.
Plan B: If we seek out the most densely populated city in the world and we all lived like that then everyone would fit into Oklahoma.
Plan C: If they all stood up as if in a lift they would all fit into Rhode Island.