To determine which car achieved the greatest efficiency, we need to calculate the fuel efficiency of each car in kilometers per liter (km/L).
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Car 1:
- Traveled 80 kilometers on 5.0 liters of gas.
- Efficiency = \( \frac{80 , \text{km}}{5.0 , \text{L}} = 16 , \text{km/L} \)
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Car 2:
- Traveled 50 kilometers on 4.0 liters of gas.
- Efficiency = \( \frac{50 , \text{km}}{4.0 , \text{L}} = 12.5 , \text{km/L} \)
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Car 3:
- Traveled 70 kilometers on 5.0 liters of gas.
- Efficiency = \( \frac{70 , \text{km}}{5.0 , \text{L}} = 14 , \text{km/L} \)
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Car 4:
- Traveled 90 kilometers on 6.0 liters of gas.
- Efficiency = \( \frac{90 , \text{km}}{6.0 , \text{L}} = 15 , \text{km/L} \)
Now we can compare the efficiency of each car:
- Car 1: 16 km/L
- Car 2: 12.5 km/L
- Car 3: 14 km/L
- Car 4: 15 km/L
The car that achieved the greatest efficiency is Car 1, which traveled 80 kilometers on 5.0 liters of gas with an efficiency of 16 km/L.