将10毫升酒装入一个圆锥容器中
- 时间:2020-05-16 19:48:28
- 分类:数学世界
- 阅读:141 次
数学题:将10毫升酒装入一个圆锥容器中,酒深正好是容器的1/2,再添入多少毫升酒可装满此容器?
此数学题解答过程:
(1)这个容器是一个倒置的圆锥体,锥角在下,底面(容器口)在上。
(2)这个容器和它的盛酒部份是一大一小两个形状相同的相似圆锥体。
(3)这两个圆锥体高的比为2:1
(4)这两个圆锥体的底面直径比为2:1
(5)这两个圆锥体底面积之比为2²:1²
(6)这两个圆锥体体积之比为2(2²):1(1²)=8:1
(7)容酒部份的小圆锥体的体积为10毫升
(8)整个容器的体积为10毫升×8÷1=80毫升。
(9)这个容器还可添80毫升-10毫升=70毫升
答:再添入70毫升酒可装满此容器。
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