A train 140m long is running at 60kmph. In how much time will it pass a platform 260m long?  Choose the correct answer.
A) 15 seconds	B) 24 seconds	C) 28 seconds	D) 30 seconds	E) 35 seconds

Rationale: "distance travelled = 140 + 260 m = 400 m speed = 60 * 5 / 8 = 50 / 3 m time = 400 * 3 / 50 = 24 second answer : b"
Answer: B