In what time will a train 50 m long cross an electric pole, it its speed be 144 km/hr?
Select the correct option.
A) 1.25 sec
B) 2.75 sec
C) 3.5 sec
D) 2.39 sec
E) 9.5 sec

Rationale: "speed = 144 * 5 / 18 = 40 m / sec time taken = 50 / 40 = 1.25 sec . answer : a"
Answer: A