In how many seconds will a train 100 meters long pass an oak tree, if the speed of the train is 36 km/hr?
Choose the correct option:  A) 6  B) 8  C) 10  D) 12  E) 14

Rationale: "speed = 36 * 5 / 18 = 10 m / s time = 100 / 10 = 10 seconds the answer is c ."
Answer: C