How long does a train 110 m long travelling at 60 kmph takes to cross a bridge of 170 m in length? Choose one:
A) 15.8 sec	B) 14.9 sec	C) 12.4 sec	D) 16.8 sec	E) 11.8 sec

Rationale: "d 16.8 sec d = 110 + 170 = 280 m s = 60 * 5 / 18 = 50 / 3 t = 280 * 3 / 50 = 16.8 sec"
Answer: D