How many seconds will a train 70 meters long take to cross a bridge 80 meters long if the speed of the train is 36 kmph? Options:
A) 22 sec  B) 27 sec  C) 25 sec  D) 15 sec  E) 11 sec

Rationale: "explanation : d = 70 + 80 = 150 s = 36 * 5 / 18 = 10 mps t = 150 / 10 = 15 sec answer : option d"
Answer: D