2020 AMC 12A Problem 3
Attempt Problem 3 of the 2020 AMC 12A below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 2020 AMC 12A solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
3.
A driver travels for hours at miles per hour, during which her car gets miles per gallon of gasoline. She is paid per mile, and her only expense is gasoline at per gallon. What is her net rate of pay, in dollars per hour, after this expense?
Answer: E
Small hint:
In hours she drives miles; find her pay and her gasoline cost for that distance
Big hint:
Divide the net earnings by the hours to get the rate per hour
Solution:
In hours she drives miles, earning
She uses gallons, costing
Her net earnings are so her rate is per hour.
Thus, E is the correct answer.
Problem 3 in other years
- 1950 AMC 12
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