A man walks 10 km north, then 6 km south, and finally 3 km east. How far is he from his starting point?
- 5 km
- 3 km
- 4 km
- None of these
Explanation
Net north = 10 − 6 = 4 km
East = 3 km
Distance from starting point = √(4² + 3²) = √25 = 5 km
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