Task: Question Answering
Input (English): Problem: a person travels equal distances with speeds of 3 km / hr , 4 km / hr and 5 km / hr and takes a total time of 47 minutes . the total distance ( in km ) is : 
Options: a ) 1 , b ) 2 , c ) 3 , d ) 4 , e ) 5
Output (English): c