In what time will a train 400 m long cross an electric pole, it its speed be 144 km/hr?	Choose the correct choice from the following options.
A) 2.5 sec	B) 12.9 sec	C) 11.3 sec	D) 21.9 sec	E) 10.0 sec

Rationale: "speed = 144 * 5 / 18 = 40 m / sec time taken = 400 / 40 = 10.0 sec . answer : e"
Answer: E