Which car has the greatest efficiency?
A: a 900 kg car that travels 15 km per liter of fuel
B: a 900 kg car that travels 20 km per liter of fuel
C: a 1,200 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 compare the efficiency of each car, we need to calculate the fuel consumption per kilometer for each one.
Car A: 900 kg / 15 km per liter = 60 kg per km
Car B: 900 kg / 20 km per liter = 45 kg per km
Car C: 1,200 kg / 20 km per liter = 60 kg per km
Car D: 1,200 kg / 15 km per liter = 80 kg per km
Therefore, Car B (45 kg per km) has the greatest efficiency as it consumes the least amount of fuel per kilometer compared to the other cars.