In what time will a train 175 m long cross an electric pole, it its speed be 180 km/hr?	Select the correct option
A) 7.5
B) 6.5
C) 5.5
D) 4.5
E) 3.5

Rationale: "speed = 180 * 5 / 18 = 50 m / sec time taken = 175 / 50 = 3.5 sec . answer : e"
Answer: E