A man walks 40 m north, then 48 m east, then 20 m south. How far is he from his starting point (in m)?
Answer and explanation
Correct answer: C. 52
- Step 1: Calculate the net displacements along perpendicular cardinal axes: along North-South, (North); along East-West, (East).
- Step 2: Use the Pythagorean theorem to calculate the straight-line displacement: .
- Step 3: Substitute the values: .
Answer
52.
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