Final answer:
To find the total capacity, convert each capacity to the same unit and add them together. The total capacity of the three bottles is 5.49 liters.
Step-by-step explanation:
To find the total capacity of the three bottles in litres, we need to convert each capacity to the same unit and then add them together. Given that 1 liter is equivalent to 1000 milliliters:
- 69 cl = 690 ml = 0.69 L
- 80 cl = 800 ml = 0.8 L
- 4 L (already in litres)
Adding the capacities together: 0.69 L + 0.8 L + 4 L = 5.49 L
Therefore, the total capacity of the three bottles is 5.49 liters.