In what time will a railway train 90 m long moving at the rate of 36 kmph pass a telegraph post on its way?
Choose the correct option: A) 8 sec B) 1 sec C) 9 sec D) 6 sec E) 2 sec

Rationale: "t = 90 / 36 * 18 / 5 = 9 sec answer : c"
Answer: C