Geometry

Question Analysis:  
This problem models a real-world application of the Pythagorean Theorem, where movement in two perpendicular directions forms a right triangle.  
The main focus is on finding the straight-line distance using the theorem.  

Key Concept Explanation:  
The path forms a right triangle, where:  
- km (east movement)  
- km (north movement)  
- is the straight-line distance (hypotenuse).  

Step-by-Step Solution:  
1. Apply the theorem:  
   
 

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