Task: Question Answering
Input (English): Problem: a man ' s basic pay for a 40 hour week is rs . 20 . overtime is paid for at 25 % above the basic rate . in a certain week he worked overtime and his total wage was rs . 25 . he therefore worked for a total of : 
Options: a ) 45 hours , b ) 47 hours , c ) 48 hours , d ) 50 hours , e ) none
Output (English): c