Which car has the greatest efficiency?
A. a 900 kg car that travels 20 km per liter of fuel
B. a 1,200 kg car that travels 20 km per liter of fuel
C• a 1,200 kg car that travels 15 km per liter of fuel
D. a 900 kg car that travels 15 km per liter of fuel
A. a 900 kg car that travels 20 km per liter of fuel
This car has the greatest efficiency as it can travel the most distance (20 km) with the least amount of fuel (1 liter).