In what time will a railway train 60 m long moving at the rate of 54 kmph pass a telegraph post on its way? Choose the correct choice:
A) 4 sec
B) 7 sec
C) 2 sec
D) 6 sec
E) 9 sec

Rationale: "t = 60 / 54 * 18 / 5 = 4 sec answer : a"
Answer: A