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Four-turn square path: compute final distance from the start Sachin walks 20 km North, turns left and walks 40 km West, turns left and walks 20 km South, then turns left and walks another 20 km. How far is he from his starting position? Choose the correct distance.

Q: Four-turn square path: compute final distance from the start Sachin walks 20 km North, turns left and walks 40 km West, turns left and walks 20 km South, then turns left and walks another 20 km. How far is he from his starting position? Choose the …

Trace the path (0,0) → (0,20) → (−40,20) → (−40,0) → (−20,0) Distance from origin |Δ| = √((−20)² + 0²) = 20 km.

Difficulty: Easy

20 km.
30 km.
50 km.
60 km.

Correct Answer: 20 km.

Explanation:

Trace the path
(0,0) → (0,20) → (−40,20) → (−40,0) → (−20,0)

Distance from origin
|Δ| = √((−20)² + 0²) = 20 km.

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