Task: Question Answering
Input (English): Problem: a car averages 35 miles per hour for the first 4 hours of a trip and averages 53 miles per hour for each additional hour of travel time . if the average speed for the entire trip is 50 miles per hour , how many hours long is the trip ? 
Options: a ) 16 , b ) 18 , c ) 20 , d ) 22 , e ) 24
Output (English): e