周长为20cm的扇形面积最大时,用该扇形卷成圆锥的侧面,求此圆锥的体积都不对,都不对,答案是125厂(π^2-1)/3π^2
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![周长为20cm的扇形面积最大时,用该扇形卷成圆锥的侧面,求此圆锥的体积都不对,都不对,答案是125厂(π^2-1)/3π^2](/uploads/image/z/6086552-32-2.jpg?t=%E5%91%A8%E9%95%BF%E4%B8%BA20cm%E7%9A%84%E6%89%87%E5%BD%A2%E9%9D%A2%E7%A7%AF%E6%9C%80%E5%A4%A7%E6%97%B6%2C%E7%94%A8%E8%AF%A5%E6%89%87%E5%BD%A2%E5%8D%B7%E6%88%90%E5%9C%86%E9%94%A5%E7%9A%84%E4%BE%A7%E9%9D%A2%2C%E6%B1%82%E6%AD%A4%E5%9C%86%E9%94%A5%E7%9A%84%E4%BD%93%E7%A7%AF%E9%83%BD%E4%B8%8D%E5%AF%B9%EF%BC%8C%E9%83%BD%E4%B8%8D%E5%AF%B9%EF%BC%8C%E7%AD%94%E6%A1%88%E6%98%AF125%E5%8E%82%EF%BC%88%CF%80%5E2-1%29%2F3%CF%80%5E2)
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