Put the cars in order of achieving the greatest efficiency. Order them, the greatest efficiency at the top to the least efficiency at the bottom.
Efficiency = Output/Input
1.A Blue car that traveled 80 kilometers on 5.0 liters of gas
2.A Yellow car that traveled 50 kilometers on 4.0 liters of gas
3.A Green car that traveled 90 kilometers on 6.0 liters of gas
4.A Red car that traveled 70 kilometers on 5.0 liters of gas
1. A Yellow car that traveled 50 kilometers on 4.0 liters of gas
2. A Red car that traveled 70 kilometers on 5.0 liters of gas
3. A Blue car that traveled 80 kilometers on 5.0 liters of gas
4. A Green car that traveled 90 kilometers on 6.0 liters of gas