UID1023816性别保密经验 EP铁粒 粒回帖0主题精华在线时间 小时注册时间2023-5-3最后登录1970-1-1
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发表于 2023-5-21 13:21:57 来自手机|显示全部楼层 IP:江苏省
Volume = 4pm 3 π R ³
8 billion people in the world, per capita weight 75KG, density 1 ton / cubic meter, per capita volume 0.075m ³
In the video, the Ranger is 500m and the ball volume is 523 million m ³.
523 million / 0.075 = 7 billion.
Almost accurate |
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