If a man walks 3 km north, 4 km east, then 3 km south, how many kms is he from starting point?

This question asks for the displacement, which is the shortest distance from the starting point to the ending point, not the total distance walked. We need to analyze the man's movements in terms of cardinal directions.

The correct answer is A: 4. The man walks 3 km North and then 3 km South. These two movements cancel each other out in the North-South direction, bringing him back to his original North-South alignment. The only remaining displacement is the 4 km he walked East. Therefore, he is 4 km from his starting point.

• B: 3 is incorrect. This is the distance he traveled North or South, which ultimately cancels out.
• C: 5 is incorrect. This would be the answer if he walked 3 km North and 4 km East, forming a right-angled triangle (3^2 + 4^2 = 5^2), but the 3 km South movement changes the final position.
• D: 6 is incorrect. This is not the displacement; it might be a partial sum of distances or a miscalculation. The total distance walked is 3+4+3 = 10 km.