1984 AMC 12 Problem 7
Attempt Problem 7 of the 1984 AMC 12 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 1984 AMC 12 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
7.
When Dave walks to school, he averages steps per minute, each of his steps cm long. It takes him minutes to get to school. His brother, Jack, going to the same school by the same route, averages steps per minute, but his steps are only cm long. How long does it take Jack to get to school?
min.
min.
min.
min.
min.
Answer: C
Small hint:
Find the route’s length from Dave’s step rate, step length, and time
Big hint:
Jack covers centimeters each minute
Solution:
The route is centimeters long. Jack covers centimeters per minute, so his time is minutes. Therefore, the correct answer is C.
Problem 7 in other years
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