A train 225 m long running at 90 kmph crosses a platform in 25 sec. What is the length of the platform?	Choose the correct choice from the following choices.
A) 271  B) 266  C) 400  D) 277  E) 232

Rationale: "length of the platform = 90 * 5 / 18 * 25 = 625 – 225 = 400 answer : c"
Answer: C