In what time will a train 40 m long cross an electric pole, it its speed be 144 km/hr?	Choose the most appropriate option.
A) 2.5 sec	B) 1.0 sec	C) 7.5 sec	D) 2.3 sec	E) 1.5 sec

Rationale: "speed = 144 * 5 / 18 = 40 m / sec time taken = 40 / 40 = 1.0 sec . answer : b"
Answer: B