Two friends start at the same point. A walks 3 km east, then 4 km north. B walks 4 km east, then 3 km north. The distance between them now is:
A0 km across all cases
B5 km
Cabout 1.4 km
D7 km
Answer & Solution
Correct answer: A. 0 km across all cases
1. A ends at (3, 4) from start; B ends at (4, 3).
2. Difference vector = (4-3, 3-4) = (1, -1).
3. Distance = sqrt(1^2 + (-1)^2) = sqrt(2).
4. = 1.414 km.
5. So they are about 1.4 km apart.
_Source: SSC CGL Reasoning (Direction Sense), standard PYQ patterns_
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