Question

The energy expenditure value of traveling by car is 3.6 MJ/passenger-kilometer. For one person making a trip of 1000 km, if a gallon of gasoline contains 120 MJ, approximately how many gallons of gasoline would be required

Answer 1

Answer:

30[gal] would be requiered.

Explanation:

The consumption ratio is given by the following expression:

$\frac{3.6[MJ]}{[1pass-km]}$

To find the amount of energy needed we must multiply the ratio by the number of passengers, in this way the unit passenger-kilometer is removed from the denominator.

$\frac{3.6[MJ]}{[1 pass-km]}*1[pass-1000km]\\\\ = 3600[MJ]$

1 gal = 120 [MJ]

  x    = 3600[MJ]

x = 30 [gal]