Final answer:
To tile the walls of a room with a floor area of 144 m² and a wall height of 2.5 m, minus the window space, one would need 87 boxes of tiles, with each box covering 1.2 m².
Step-by-step explanation:
To calculate the number of boxes of tiles needed to tile the training room walls, we need to calculate the total area to be covered and then divide it by the area that each box of tiles covers. The given dimensions of the room are a floor with a square footprint of 12 m by 12 m and a wall height of 2.5 m. There are four walls, each with two windows that have an area of 2 m².
First, we calculate the total wall area without windows: the perimeter (× height) which is 12 m + 12 m + 12 m + 12 m = 48 m (perimeter) × 2.5 m = 120 m² (total wall area). Next, we subtract the area of the windows: 8 windows × 2 m²/window = 16 m², so 120 m² - 16 m² = 104 m² of wall area to be tiled.
Each box of tiles covers 1.2 m². To know how many boxes are needed, divide the total area to be tiled (104 m²) by the area covered by one box of tiles: 104 m² ÷ 1.2 m²/box = 86.67 boxes.
Since we cannot buy a fraction of a box, we must round up. Therefore, we need 87 boxes of tiles to cover the walls.