Task: Question Answering
Input (English): Problem: on the first day of her vacation , louisa traveled 250 miles . on the second day , traveling at the same average speed , she traveled 350 miles . if the 250 - mile trip took 3 hours less than the 350 - mile trip , what was the average speed , in miles per hour ? 
Options: a ) 31 , b ) 33.33 , c ) 35 , d ) 37 , e ) 39.33
Output (English): b