A train is 320 meter long is running at a speed of 45 km/hour. In what time will it pass a bridge of 140 meter length?
Answers.
A) 11 seconds B) 38 seconds C) 40 seconds D) 88 seconds E) 36.8 seconds

Rationale: "speed = 45 km / hr = 45 * ( 5 / 18 ) m / sec = 25 / 2 m / sec total distance = 320 + 140 = 460 meter time = distance / speed = 460 * ( 2 / 25 ) = 36.8 seconds answer : e"
Answer: E