Task: Question Answering
Input (English): Problem: two cars start at the same time from opposite ends of a highway that is 175 miles long . one car is riding at 25 mph and the second car is riding at 45 mph . how long after they begin will they meet ? 
Options: a ) 2 , b ) 2.5 , c ) 3 , d ) 3.5 , e ) 4
Output (English): b