Calculate how much time could be saved if the train would run at its usual speed, given that it ran at 6/8 of its own speed and got to its destination in 11 hours?  Pick one:
A) 2.5 hrs
B) 2.9 hrs
C) 4.5 hrs
D) 3.5 hrs
E) 1.5 hrs

Rationale: new speed = 6 / 8 of usual speed new time = 6 / 8 of usual time 6 / 8 of usual time = 10 hrs usual time = 10 * 6 / 8 = 7.5 hrs time saved = 10 - 7.5 = 2.5 hrs answer is a
Answer: A