How long does a train 100 m long traveling at 54 kmph takes to cross a station of 250 m in length?	Choices.
A) 22 sec
B) 20 sec
C) 15 sec
D) 23 sec
E) 16 sec

Rationale: "d = 100 + 245 = 345 m s = 54 * 5 / 18 = 15 t = 345 * 1 / 15 = 23 sec answer : d"
Answer: D