Task: Question Answering
Input (English): Problem: a person travels equal distances with speeds of 9 km / hr , 10 km / hr and 11 km / hr and takes a total time of 47 minutes . the total distance is ? 
Options: a ) 6 km , b ) 3 km , c ) 8 km , d ) 9 km , e ) 2 km
Output (English): c