2020 AMC 8 Problems/Problem 11
After school, Maya and Naomi headed to the beach, miles away. Maya decided to bike while Naomi took a bus. The graph below shows their journeys, indicating the time and distance traveled. What was the difference, in miles per hour, between Naomi's and Maya's average speeds?
We use the formula . Naomi's distance is miles, and her time is minutes, which is equivalent to of an hour.