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A boy walks \(8 \text{ km} \) west, then \( 3 \text{ km} \) south, and then \( 3 \text{ km} \) east. Determine his net displacement.

Let \( +\hat{i} \) be the unit vector for east, and \( +\hat{j}\) be that for north.

A girl walks \(600 \text{ m} \) east, then \( 1 \text{ km} \) south, and then \( 5 \text{ km} \) east. Find her total displacement.

\( +\hat{i} \) is the unit vector for east, and \( +\hat{j}\) is that for north.

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