Final answer:
The car travels 96 kilometers on 12 litres of petrol.
Step-by-step explanation:
To find out how far the car travels on 12 litres of petrol, we can set up a proportion using the given information.
Let's call the distance the car travels on 12 litres of petrol x kilometers.
We can write the proportion:
40 km / 5 L = x km / 12 L
To solve for x, we can cross-multiply and divide:
x = (40 km * 12 L) / 5 L
x = 96 km
Therefore, the car will travel 96 kilometers on 12 litres of petrol.