1. **Problem Statement:** Calculate the total volume of units 1 to 15, each with a height of 3 meters. 2. **Given Data:** Each unit has a floor area defined by the floor plan. The wall thickness is 230 mm (0.23 m), and the height is 3 m. 3. **Assumption:** Each unit's floor area is approximated by the product of its length and width from the given dimensions. Since exact individual unit dimensions are not fully specified, we use the given repeated dimension 1700 mm (1.7 m) and 809 mm (0.809 m) as unit widths and lengths for calculation. 4. **Calculate the floor area of one unit:** $$\text{Area} = \text{length} \times \text{width} = 1.7\,m \times 0.809\,m = 1.3753\,m^2$$ 5. **Calculate the volume of one unit:** $$\text{Volume} = \text{Area} \times \text{height} = 1.3753\,m^2 \times 3\,m = 4.1259\,m^3$$ 6. **Calculate total volume for units 1 to 15:** $$\text{Total Volume} = 15 \times 4.1259\,m^3 = 61.8885\,m^3$$ **Final answer:** The total volume of units 1 to 15 with height 3 m is approximately **61.89 cubic meters**.