1951 AMC 12 Problem 4
Attempt Problem 4 of the 1951 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 1951 AMC 12 solutions, or check the answer key.
All problems are used with official legal permission of the Mathematical Association of America (MAA).
4.
A barn with a flat roof is rectangular in shape, yd. wide, yd. long, and yd. high. It is to be painted inside and outside, and on the ceiling, but not on the roof or floor. The total number of square yards to be painted is:
Answer: D
Small hint:
Count both the inside and outside faces of each of the four walls
Big hint:
The ceiling contributes one -by- rectangle
Solution:
The four walls have one-sided area Painting them inside and outside contributes The ceiling adds so the total is
Thus, the correct answer is D.
Problem 4 in other years
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