A train running at the speed of 72 km/hr crosses a pole in 9 seconds. What is the length of the train?	Choose the correct choice from the following:  A) 286  B) 278  C) 255  D) 180  E) 287

Rationale: "speed = ( 72 * 5 / 18 ) m / sec = ( 20 ) m / sec length of the train = ( speed x time ) = ( 20 * 9 ) m = 180 m . answer : d"
Answer: D