Task: Question Answering
Input (English): Problem: a car that moves at an average speed of 60 kmph , reaches its destination on time . when its average speed becomes 50 kmph , then it reaches its destination 45 minutes late . find the length of journey . 
Options: a ) 189 km , b ) 225 km , c ) 255 km , d ) 199 km , e ) none
Output (English): b