In what time will a train 300 meters long cross an electric pole, if its speed is 90 km/hr Pick one:
A) 5 seconds
B) 12 seconds
C) 3 seconds
D) 2.5 seconds
E) none of these

Rationale: "explanation : first convert speed into m / sec speed = 90 * ( 5 / 18 ) = 25 m / sec time = distance / speed = 300 / 25 = 12 seconds answer : b"
Answer: B