A train 250 m long running at 72 kmph crosses a platform in 30 sec. What is the length of the platform?  Choose the correct option:  A) 350 m  B) 200 m  C) 250 m  D) 270 m  E) 300 m

Rationale: "d = 72 * 5 / 18 = 30 = 600 â € “ 250 = 350 m answer : a"
Answer: A