Javier's grandmother lives 120 miles away. It takes 1 hour to travel 40 miles by train. If Javier leaves a7 7 A.M., is it reasonable to say he will arrive in his grandmother's city by 9 A.M. ?
No it isn't. If it takes 1 hour to travel 40 miles and she lives 129 miles away, it would take 3 hours. So they would reach their grandmother's house by 10:00 am.