Instructions: 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'.
Input: Problem: a train is 357 meter long is running at a speed of 42 km / hour . in what time will it pass a bridge of 137 meter length ? 
Options: a ) 44 , b ) 42.343 , c ) 50 , d ) 39.252 , e ) 27.851
Output:
b