A train running at the speed of 180 km/hr crosses a pole in 7 seconds. What is the length of the train? Choose the correct choice from the following answers
A) 530 B) 305 C) 503 D) 430 E) 350

Rationale: "speed = ( 180 * 5 / 18 ) m / sec = ( 50 ) m / sec length of the train = ( speed x time ) = ( 50 * 7 ) m = 350 m . answer : e"
Answer: E