AMC 8 1986 Problem 18
AMC8 1986 年第 18 题
面积与周长（综合）★★★☆☆
A rectangular grazing area is to be fenced off on three sides using part of a 100 meter rock wall as the fourth side. Fence posts are to be placed every 12 meters along the fence including the two posts where the fence meets the rock wall. What is the fewest number of posts required to fence an area 36 m by 60 m?
一块矩形放牧区需用围墙三面围起，以一段 100 米的石墙作为第四边。围墙柱每隔 12 米竖一根，包括围墙与石墙相接处的两根柱子。围起 36 m × 60 m 的区域最少需要多少根柱子？
- A.11
- B.12
- C.13
- D.14
- E.16
正确答案 · Correct Answer
B
解析 · Solution
解析整理中
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