Task: Question Answering
Input (English): Problem: jerry and beth each drove from smallville to crown city by different routes . jerry drove an an average speed of 40 miles per hour and completed the trip in 30 minutes . beth ' s route was 5 miles longer , and it took her 20 minutes more than jerry to complete the trip . how many miles per hour was beth ' s average speed on this trip ? 
Options: a ) 24 , b ) 30 , c ) 48 , d ) 54 , e ) 75
Output (English): b