Excluding stoppages, the speed of a train is 67 kmph and including stoppages it is 51 kmph. Of how many minutes does the train stop per hour? Choose the correct answer
A) 82 B) 17 C) 14 D) 82 E) 18

Rationale: "explanation : t = 16 / 67 * 60 = 14 answer : option c"
Answer: C