Task: Question Answering
Input (English): Problem: winson traveled the entire 60 miles trip. if he did the first 10 miles of at a constant rate 20 miles per hour and the remaining trip of at a constant rate 48 miles per hour, what is the his average speed, in miles per hour ?
Options: a. 20 mph, b. 24 mph, c. 30 mph, d. 32 mph, e. 40 mph
Output (English): e