Respuesta :
Answer:
The European car is more efficient (5.2 vs 7.35 L/100km)
Explanation:
To compare the two efficiencies we have to have them in the same units.
We have that 1 mi. is equal to 1.61 km and 1 gal is 3.785 litres.
The american car efficiency can be expressed as:
[tex]Ef=32\frac{mi}{gal}*\frac{1.61km}{1 mi}*\frac{1gal}{3.785\,L} \\\\Ef=13.6\,km/L[/tex]
We calculate the amount of kilometers the car can make with one litre of fuel. To know the efficiency in L/(100 km) we have to rearrange the expression:
[tex]\eta=\frac{1}{13.6}\frac{L}{km} *\frac{100}{100}=\frac{100}{13.6}*\frac{L}{100\, km} \\\\\eta=7.35 \, \frac{L}{100\, km}[/tex]
We know now that the american car consumes 7.35 L per 100 km, which is higher than the european car.
So, the European car is more efficient (5.2 vs 7.35 L/100km)
