Task: Question Answering
Input (English): Problem: each week , harry is paid x dollars per hour for the first 30 hours and 1.5 x dollars for each additional hour worked that week . each week , annie is paid x dollars per hour for the first 40 hours and 2 x dollars for each additional hour worked that week . last week annie worked a total of 50 hours . if harry and annie were paid the same amount last week , how many hours did harry work last week ? 
Options: a ) 40 , b ) 45 , c ) 50 , d ) 55 , e ) 60
Output (English): c