来自侯强的问题
【一个长方体容器,长12厘米,宽10厘米,高20厘米,容器中盛满了水,当这个容器地面的一条棱靠着桌面倾斜45°时,容器内剩下的水的体积最少是多少立方厘米?】
一个长方体容器,长12厘米,宽10厘米,高20厘米,容器中盛满了水,当这个容器地面的一条棱靠着桌面倾斜45°时,容器内剩下的水的体积最少是多少立方厘米?
1回答
2020-05-22 18:05
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童泉斌
∵该长方体容器面倾斜45°,水成三棱柱
则该正面为等腰直角三角形,腰=高=20CM
以长方体宽为三棱柱的高
则水的体积V=20*20*（√3/4）*10=100根号3
2020-05-22 18:07:19
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