How long does a train 100 m long running at the speed of 65 km/hr takes to cross a bridge 145 m length?  Answers:
A) 13.6 sec
B) 12.1 sec
C) 17.9 sec
D) 61.9 sec
E) 47.98 sec

Rationale: "speed = 65 * 5 / 18 = 18 m / sec total distance covered = 100 + 145 = 245 m . required time = 245 / 18 = 13.6 sec . answer : a"
Answer: A