Q: In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.
Problem: a train 310 m long is running at a speed of 45 km / hr . in what time will it pass a bridge 140 m long ? 
Options: a ) 40 , b ) 56 , c ) 41 , d ) 36 , e ) 34
A:
d