¶ 2020 AMC8 Problem 11
Problem:
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?
Answer Choices:
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Solution:
Average speed equals the total distance traveled divided by the elapsed time. Maya covered the distance of miles in minutes, which is of an hour. Her average speed was miles per hour. Naomi covered the same distance in minutes, which is of an hour. Her average speed was miles per hour. The difference between their average speeds was miles per hour.
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions