How long does a train 110 m long travelling at 60 kmph takes to cross a bridge of 200 m in length?  Choose the correct choice from the following
A) 18.6 sec
B) 14.9 sec
C) 12.4 sec
D) 16.8 sec
E) 11.8 sec

Rationale: "a 18.6 sec d = 110 + 200 = 310 m s = 60 * 5 / 18 = 50 / 3 t = 310 * 3 / 50 = 18.6 sec answer is a"
Answer: A