1985 AMC 8 Problem 19
Attempt Problem 19 of the 1985 AMC 8 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 1985 AMC 8 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
19.
If the length and width of a rectangle are each increased by then the perimeter of the rectangle is increased by
Answer: B
Small hint:
The perimeter is
Big hint:
Multiplying both and by multiplies the whole perimeter by
Solution:
The new perimeter is which is times the old perimeter.
That is a increase.
Thus, the correct answer is B .
Problem 19 in other years
- 1986 AMC 8
- 1987 AMC 8
- 1988 AMC 8
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