Excluding stoppages, the speed of a train is 55 kmph and including stoppages it is 30 kmph. Of how many minutes does the train stop per hour?  Choose the correct option:
A) 82 B) 27 C) 12 D) 82 E) 18

Rationale: "explanation : t = 25 / 55 * 60 = 27 answer : option b"
Answer: B