1950 AMC 12 Problem 27
Attempt Problem 27 of the 1950 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 1950 AMC 12 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
27.
A car travels miles from to at miles per hour but returns the same distance at miles per hour. The average speed for the round trip is closest to:
mph
mph
mph
mph
mph
Answer: B
Small hint:
Average speed is total distance divided by total time
Big hint:
The two legs take and hours
Solution:
The total distance is miles. The travel times are hours and hours, so the average speed, in miles per hour, is which is closest to mph.
Thus, the correct answer is B.
Problem 27 in other years
- 1951 AMC 12
- 1952 AMC 12
- 1953 AMC 12
- 1954 AMC 12
- 1955 AMC 12
- 1956 AMC 12
- 1957 AMC 12
- 1958 AMC 12
- 1959 AMC 12
- 1960 AMC 12
- 1961 AMC 12
- 1962 AMC 12
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