Task: Question Answering
Input (English): Problem: a driver goes on a trip of 50 kilometers , the first 25 kilometers at 60 kilometers per hour and the remaining distance at 30 kilometers per hour . what is the average speed of the entire trip in kilometers per hour ? 
Options: a ) 35 , b ) 36 , c ) 40 , d ) 42 , e ) 45
Output (English): c