Опрос от журнала "8 часов": "Чем Вы питаетесь на работе?"

A motorist travels 120 miles to his destination at an average speed of 60 miles
per hour and returns to his starting point at an average speed of 40 miles per
hour. His average speed for the entire trip is


А) 53 miles per hour
В) 50 miles per hour
С) 48 miles per hour
D) 45 miles per hour
Е) 52 miles per hour