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In the spring of 2008, petrol cost £1.029 per litre in london. On the same day, the exchange rate was $1 = £0.485. What was the price of london petrol in dollars ($) per gallon? (1 gal = 3.7854 l) $8.03 /gal $1.89 /gal $7.80 /gal $1.78 /gal $3.90 /gal

Respuesta :

The correct option is :  $8.03/gal.

Explanation

In the spring of 2008, petrol cost £1.029 per liter in London and the exchange rate was $1 = £0.485

So, £1.029 = [tex]\frac{1.029}{0.485} dollar = 2.1216.... dollar[/tex]

Also, 1 gallon = 3.7854 liters

So, 1 liter = [tex]\frac{1}{3.7854} gallon= 0.2641.....gallon[/tex]

Now, £1.029 per liter = [tex]\frac{2.1216...}{0.2641...} dollars/gallon = 8.03 dollars/gallon[/tex]

Thus, the price of London petrol in dollars per gallon was $8.03/gal.


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