In what time will a train 120 m long cross an electric pole, it its speed be 121 km/hr?  Choose the correct answer
A) 2.5 B) 2.7 C) 2.9 D) 3.6 E) 2.1

Rationale: "speed = 121 * 5 / 18 = 33.6 m / sec time taken = 120 / 33.6 = 3.6 sec . answer : d"
Answer: D