In what time will a train 100 m long cross an electric pole, it its speed be 126 km/hr? Pick:  A) 2.5  B) 2.9  C) 2.4  D) 2.85  E) 2.1

Rationale: "speed = 126 * 5 / 18 = 35 m / sec time taken = 100 / 35 = 2.85 sec . answer : d"
Answer: D