First calculate the total amount of liters consumed:
Volume gas consumed = (6 L / 100 km) * 2000 km = 120 L
Then calculate the total cost:
Cost = ($1.20 / L) * 120 L = $144
Since there are three of them, so each must pay:
Payment of each = $144 / 3 = $48 per person
Answer:
$48 per person