A train 250 m long running at 72 kmph crosses a platform in 20 sec. What is the length of the platform?
Choose the correct answer:	A) 150 m	B) 200 m	C) 250 m	D) 270 m	E) 300 m

Rationale: "d = 72 * 5 / 18 = 20 = 400 â € “ 250 = 150 m answer : a"
Answer: A