Task: Question Answering
Input (English): Problem: two cars are driving toward each other . the first car is traveling at a speed of 60 km / h , which is 25 % slower than the second car ' s speed . if the distance between the cars is 770 km , how many hours will it take until the two cars meet ? 
Options: a ) 4 , b ) 4.5 , c ) 5 , d ) 5.5 , e ) 6
Output (English): d