Task: Question Answering
Input (English): Problem: car x began traveling at an average speed of 35 miles per hour . after 72 minutes , car y began traveling at an average speed of 38 miles per hour . when both cars had traveled the same distance , both cars stopped . how many miles did car x travel from the time car y began traveling until both cars stopped ? 
Options: a ) 405 , b ) 420 , c ) 440 , d ) 447 , e ) 490
Output (English): e