Answer:
D) None of the answers are correct
Step-by-step explanation:
Let t be the time since the first car leaves
Distance of first car:
90t
Distance of second car:
120(t - 3)
90t = 120(t - 3)
90t = 120t - 360
360 = 30t
t = 12
The second car takes 12-3 = 9 hours to reach it