A train running at 1/2 of its own speed reached a place in 8 hours. How much time could be saved if the train would have run at its own speed?  Choose the correct choice from the following answers.
A) 8 hrs B) 10 hrs C) 4 hrs D) 15 hrs E) 6 hrs

Rationale: time taken if run its own speed = 1 / 2 * 8 = 4 hrs time saved = 8 - 4 = 4 hrs answer : c
Answer: C