In what time will a train 100 meters long cross an electric pole, if its speed is 144 km/hr Select the correct option.
A) 8.5 seconds B) 2.8 seconds C) 3.5 seconds D) 2.5 seconds E) 2.6 seconds

Rationale: "first convert speed into m / sec speed = 144 * ( 5 / 18 ) = 40 m / sec time = distance / speed = 100 / 40 = 2.5 seconds answer : d"
Answer: D