You know you only have 1 hour because it says "YOU TRAVELED HALF WAY" Half way of 60 is 30 and you are traveling at 30 PER HOUR, so if your total distance at that point is 30kh it MUST HAVE TAKEN 1 hour to do it. Now that your HOUR is used up, Even if you traveled at 4 billion miles an hour, you can not change the fact that your Hourly Rate of Travel "WAS" 30Km per hour.... s***, Now I'm confusing myself... My head hurts. . . . . . I need a drink.lol
I don't understand how you differentiate distance and time. How does having traveled half way in space mean unequivocally that your hour is used up? Why not say you've traveled halfway in space and halfway in time, so you have two hours total? Why does the distance dictate the time at all? The whole point of speed is the relation between distance and time, when you arbitrarily state that one supercedes the other the question of variable speeds becomes irrelevant.