A man walks 3 km east from his house, then turns south and walks 4 km, and finally turns west and walks 6 km. How far is he from his starting point?
Question and options
A man walks 3 km east from his house, then turns south and walks 4 km, and finally turns west and walks 6 km. How far is he from his starting point?
- 7 km
- 4 km
- 5 km
- 3 km
Answer and explanation
Correct answer: C - 5 km
Net displacement: 3 east - 6 west = 3 km west, 4 km south. Distance = sqrt(3^2+4^2) = 5 km.
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