Kerem, who lives in city A, wants to visit Aslı in city B. After determining the route between these two cities from a map, Kerem calculates that if he leaves at a planned time and drives at 100 km/h, he will arrive in city B at 09:00, and if he drives at 60 km/h, he will arrive at 11:00 on the same day.
Accordingly, if Kerem leaves at the planned time and arrives in city B at 10:00 on the same day, what should be the speed of his vehicle in km/h?
A) 72
B) 75
C) 80
D) 85
E) 88