A train running at the speed of 36 km/hr crosses a pole in 9 seconds. What is the length of the train? Choose one:
A) 120 metres
B) 180 metres
C) 324 metres
D) 90 metres
E) 100 meters

Rationale: "speed = 36 x 5 / 18 m / sec = 30 / 3 m / sec . length of the train = ( speed x time ) . length of the train = 30 / 3 x 9 m = 90 m . answer : d"
Answer: D