In how many seconds will a train 180 meters long pass an oak tree, if the speed of the train is 54 km/hr?  Choose the most appropriate option:
A) 10 B) 12 C) 14 D) 16 E) 18

Rationale: speed = 54 * 5 / 18 = 15 m / s time = 180 / 15 = 12 seconds the answer is b .
Answer: B