A train is 400 meter long is running at a speed of 60 km/hour. In what time will it pass a signal post?	Choose the correct choice from the following answers:
A) 28 seconds
B) 30 seconds
C) 40 seconds
D) 24 seconds
E) 18 seconds

Rationale: speed = 60 km / hr = 60 * ( 5 / 18 ) m / sec = 150 / 9 m / sec total distance = 400 meter time = distance / speed = 400 * ( 9 / 150 ) = 24 seconds answer : d
Answer: D