If you are in a river, in a boat with a boulder, and the boulder falls into the river, how does the water level of the river change?

If you are in a river, in a boat with a boulder, and the boulder falls into the river, how does the water level of the river change?

题目类型: 情景面试题

这是一道情景面试题，常见于澳洲IT公司面试中。

难度: medium

分类: problem-solving, communication

标签: Brain Teaser, Physics Reasoning

目标岗位: Software Engineer, Data Scientist

目标公司: Apple

参考答案摘要

水位会下降：石头在船里时，船为了“托起石头的重量”需要排开更多的水（按重量等效排水）；石头掉入河底后，只按石头自身体积排水。因为石头密度大于水，按体积排开的水更少，所以总体排水量变小，水位下降。

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