which car has the greatest efficiency?

A) a 900 kg car that travels 15 km per liter of fuel
B) a 1,200 kg car that travels 20 km per liter of fuel
C) a 900 kg car that travels 20 km per liter of fuel
D) a 1,200 kg car that travels 15 km per liter of fuel

To determine which car has the greatest efficiency, we need to calculate the fuel consumption rate for each car. This can be done by dividing the distance traveled by the amount of fuel consumed.

A) The 900 kg car travels 15 km per liter of fuel.
Fuel consumption rate = 15 km/liter.

B) The 1,200 kg car travels 20 km per liter of fuel.
Fuel consumption rate = 20 km/liter.

C) The 900 kg car travels 20 km per liter of fuel.
Fuel consumption rate = 20 km/liter.

D) The 1,200 kg car travels 15 km per liter of fuel.
Fuel consumption rate = 15 km/liter.

Comparing the fuel consumption rates, we can see that car C, the 900 kg car that travels 20 km per liter of fuel, has the greatest efficiency.