某广告公司现对广告设计图案进行涂色.有以下问题请你帮忙解决.
(1)如图1是某个矩形广告图案的一部分,每平方米涂刷需要用油漆0.5千克,已涂色部分涂刷用去3.75千克油漆.求矩形广告的高是多少米?
(2)大约还需要多少千克油漆才能把图1中①②部分涂完?(
)
(3)如图2中的矩形
是面积为18
的广告牌,现已用同样的油漆对图中的阴影部分完成涂刷、已知
.现需对空白的
部分用特殊涂料涂色,求
面积.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/8/299abaa9-d2cf-40b6-8822-f696a27a31e4.png?resizew=403)
(1)如图1是某个矩形广告图案的一部分,每平方米涂刷需要用油漆0.5千克,已涂色部分涂刷用去3.75千克油漆.求矩形广告的高是多少米?
(2)大约还需要多少千克油漆才能把图1中①②部分涂完?(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a061dce0c7716ceab53159cd4ce7904.png)
(3)如图2中的矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c901bcdfa58f0c68ad0161b0bab269.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4de01d42bbef8aa640fc2dbac4a7de0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/8/299abaa9-d2cf-40b6-8822-f696a27a31e4.png?resizew=403)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/9/5d6b0d54-a1c7-41c8-8f12-e409f8296acf.png?resizew=186)
更新时间:2023-09-13 11:01:33
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【推荐1】如图长方形的长BC为8,宽AB为4.以BC为直径画半圆,以点D为圆心,CD为半径画弧.求阴影部分的周长和面积.
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