A train 450 m long running at 108 kmph crosses a platform in 25 sec. What is the length of the platform?  Choose the correct option:
A) 271  B) 266  C) 350  D) 277  E) 300

Rationale: "length of the platform = 108 * 5 / 18 * 25 = 750 – 450 = 300 answer : e"
Answer: E