Rohan walks 3 km North, then 2 km West, then 3 km South, then 3 km East. How far from the starting point is he now?
Verbal Reasoning
Direction Sense Test
Difficulty: Easy
Choose an option
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A1 KM
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B2 KM
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C3 KM
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D5 KM
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ENone of these
Answer
Correct Answer: 1 KM
Explanation
Introduction / Context:The path forms a near-rectangle with one side longer on the final East leg. We compute net displacements on each axis and then the straight-line distance to the origin.
Given Data / Assumptions:
- 3 km North → y = +3.
- 2 km West → x = −2.
- 3 km South → y back to 0.
- 3 km East → x = −2 + 3 = +1.
Concept / Approach:End point: (1, 0). Distance to origin is simply the absolute x-offset.
Step-by-Step Solution:Final coordinates: (1, 0).Distance = sqrt(1^2 + 0^2) = 1 km.
Verification / Alternative check:North/South cancel; net East = 1 km.
Why Other Options Are Wrong:2/3/5 km do not reflect the computed net offset.
Common Pitfalls:Forgetting that the North and South legs cancel exactly.
Final Answer:1 KM