Task: Question Answering
Input (English): Problem: a person travels equal distances with speeds of 50 km / hr , 100 km / hr and 120 km / hr and takes a total time of 23 minutes . the total distance is ? 
Options: a ) 15 km , b ) 30 km , c ) 45 km , d ) 50 km , e ) 60 km
Output (English): b