Which car has the greatest efficiency a 900 kg car that travels 200 km per liter of fuel b 1,200 kg car that travels to 20 km per liter

The first car, a 900 kg car that travels 200 km per liter of fuel, has the greater efficiency. This car is able to travel much further on the same amount of fuel compared to the 1,200 kg car that travels 20 km per liter.