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:
A.
B.
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E.
Solution:
Naomi traveled miles in minutes. This ratio is:
Maya traveled miles in minutes. This ratio is:
The difference between their speeds is .
Thus, the correct answer is .
Answer: .
The problems on this page are the property of the MAA's American Mathematics Competitions