Which car has the greatest efficiency?

a 900 kg car that travels 20 km per liter of fuel

To determine the car with the greatest efficiency, we need to consider the cars that consume the least amount of fuel to travel a certain distance.

Car A: 900 kg car that travels 20 km per liter of fuel

We can calculate the fuel efficiency of Car A by dividing the distance traveled by the amount of fuel consumed:

Fuel Efficiency = Distance Traveled / Fuel Consumed
Fuel Efficiency = 20 km / 1 liter
Fuel Efficiency = 20 km/liter

Now, let's compare this with other cars to determine the one with the greatest efficiency.