
Patrick Z. answered 05/15/19
Experienced Math and Physics Tutor, MCAT, AP, and ACT Test Prep
Hey Zoe!
In order to find the solution to this question, we can first set up the proportional relationship between distance traveled and litres consumed. If we let the number of litres consumed per 100 km be x, then we can write
72 L / 840 km = x L / 100 km
Now, all we have to do is cross multiply and divide to solve for x
x = (100 km * 72 L) / 840 km = 8.57 L
So, the fuel consumption of the car is 8.57 L/100km.