一个多面体的底面是边长为s的等边三角形,等边三角形的一个顶点在原点,高在x轴上,每个与x轴垂直的剖面都为正方形,剖面的一条边位于底面内,求多面体的体积
帮我翻译一道数学题the base of a solid is an equilateral triangle of s
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