How much time does a train 225 metres long running at 90 km/hr take to pass a pole? Choices.
A) 7.9 s  B) 2.5 s  C) 7.5 s  D) 9 s  E) 7.4 s

Rationale: "explanation : 90 km / hr = 90 * 5 / 18 = 25 m / s speed = distance / time ; v = d / t 25 = 225 / t t = 9 s answer : d"
Answer: D