A train running at the speed of 108 km/hr crosses a pole in 7 seconds. Find the length of the train.	Options:
A) 150 meter B) 145 meter C) 140 meter D) 135 meter E) 210 meter

Rationale: "explanation : speed = 108 * ( 5 / 18 ) m / sec = 30 m / sec length of train ( distance ) = speed * time = 30 * 7 = 210 meter option e"
Answer: E