Two men walking apart — Direction Sense Aptitude Question
Two men walking apart: Two men start from the same point. One walks 4 km north and the other 3 km east. Answer and worked solution on CodeKairo.
- Topic: Direction Sense
- Section: Logical Reasoning
- Difficulty: Easy
- Time target: 45 seconds
Question
Two men start from the same point. One walks 4 km north and the other 3 km east. How far apart are they?
Options
- 1 km
- 5 km
- 7 km
- 12 km
Show the answer and the worked solution
Correct answer: B. 5 km
Worked solution
- Distance apart = √(4² + 3²) = 5 km.
Answer: 5 km.
The idea
Two perpendicular displacements from a common start form a right triangle whose hypotenuse is the gap between them.
Shortcut. The two paths are perpendicular legs of 4 and 3, so their ends are a 3-4-5 hypotenuse apart: 5 km.
Common trap. "1 km" — subtracting 3 from 4 as if both walked along the same line; they walked at right angles.