In what time will a train 100 m long cross an electric pole, it its speed be 144 km/hr?
Choose the correct option.
A) 2.5 sec B) 2.8 sec C) 8.5 sec D) 2.2 sec E) 4.5 sec

Rationale: "speed = 144 * 5 / 18 = 40 m / sec time taken = 100 / 40 = 2.5 sec . answer : a"
Answer: A