A train 175 m long running at 36 kmph crosses a platform in 40 sec. What is the length of the platform?	Choose the correct answer
A) 271 B) 266 C) 225 D) 277 E) 232

Rationale: "length of the platform = 36 * 5 / 18 * 40 = 400 – 175 = 225 answer : c"
Answer: C