2020 AMC 8 第 3 题

先试着解答 2020 AMC 8 第 3 题,然后核对你的答案与视频与精心整理的解答,解答来自 LIVE by Po-Shen Loh。你也可以参加完整限时模拟考试、查看全部 2020 AMC 8 解答,或核对答案。

所有题目均经美国数学协会(MAA)官方合法授权使用。

3.

凯莉有一个 66 英尺乘 88 英尺的矩形花园。她把整个花园都种上草莓。每平方英尺可以种 44 株草莓,每株平均收获 1010 个草莓。她预计可以收获多少个草莓?
Carrie has a rectangular garden that measures 66 feet by 88 feet. She plants the entire garden with strawberry plants. Carrie is able to plant 44 strawberry plants per square foot, and she harvests an average of 1010 strawberries per plant. How many strawberries can she expect to harvest?
560560
960960
11201120
19201920
38403840
答案:D
知识点:面积速率
小提示:
先求花园面积
First find the garden area
大提示:
面积乘以每平方英尺的株数,再乘以每株草莓数
Multiply area by plants per square foot, then by strawberries per plant
视频讲解:
解答视频缩略图
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文字解答:
花园面积为 6⋅8=486\cdot8=48 平方英尺。
每平方英尺可种 44 株,所以凯莉总共可种 4⋅48=1924\cdot 48=192 株草莓。
每株平均 1010 个草莓,所以总数为 10⋅192=192010\cdot 192=1920。
正确答案是 D。
First, the size of the garden is 6⋅8=486\cdot8=48 square feet.
Next, since there are 44 plants per square foot, Carrie can plant 4⋅48=1924\cdot 48=192 plants total.
Finally, since there are 1010 strawberries per plant, Carrie can harvest 10⋅192=192010\cdot 192=1920 strawberries total.
Thus, the correct answer is D.
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