Task: Question Answering
Input (English): Problem: a beats b by 50 m in a race of 500 m , then b beats by c by 25 m in a race of 500 m . find the distance by which a beats c in a race of 400 ? 
Options: a ) 55 m , b ) 56 m , c ) 57 m , d ) 58 m , e ) 59 m
Output (English): d