In what time will a train 100 meters long cross an electric pole, if its speed is 90 km/hr  Choose the most appropriate option.
A) 8.5 seconds B) 2.8 seconds C) 3.5 seconds D) 2.5 seconds E) 4 seconds

Rationale: "first convert speed into m / sec speed = 90 * ( 5 / 18 ) = 25 m / sec time = distance / speed = 100 / 25 = 4 seconds answer : e"
Answer: E