A train is 360 meter long is running at a speed of 60 km/hour. In what time will it pass a bridge of 140 meter length? Choose the correct choice from the following answers:
A) 27 seconds
B) 29 seconds
C) 40 seconds
D) 30 seconds
E) 12 seconds

Rationale: "speed = 60 km / hr = 60 * ( 5 / 18 ) m / sec = 50 / 3 m / sec total distance = 360 + 140 = 500 meter time = distance / speed = 500 * ( 3 / 50 ) = 30 seconds answer : d"
Answer: D