To determine how tall the tree should be, follow these steps:
1. Identify the height of the ceiling: The ceiling height is 220 centimetres.
2. Determine the space needed between the tree and the ceiling: You want a space of 5 centimetres between the top of the tree and the ceiling.
3. Calculate the maximum height of the tree:
- Start with the ceiling height: 220 centimetres.
- Subtract the desired space from the ceiling height: 220 centimetres - 5 centimetres = 215 centimetres.
Therefore, the height of the tree should be 215 centimetres.
