Task: Question Answering
Input (English): Problem: two cars are driving toward each other . the first car is traveling at a speed of 90 km / h , which is 50 % faster than the second car ' s speed . if the distance between the cars is 975 km , how many hours will it take until the two cars meet ? 
Options: a ) 6 , b ) 6.5 , c ) 7 , d ) 7.5 , e ) 8
Output (English): b