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Prithvi starts walking from his home in the south direction and walks 7 km to reach point A. Then he takes a right turn and walks 5 km to reach point B. From point B, he turns 90 degrees to his left and walks 8 km to reach point C. From point C again, he turns 90 degrees to his left and walks 10 km to reach point D. Then he takes a left turn and walks 17 km in the north direction to reach point E. Finally, he makes a 90-degree left turn and walks 5 km to reach point F. Question: What is the distance between Prithvi's house and the final point?

1. 3 km
2. 5 km
3. 1 km
4. 2 km

Correct answer: 2 km

Solution

The path can be reduced by converting each move into coordinate shifts. After all movements, the net displacement from the house is 2 km, so the straight-line distance is 2 km.

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