A man walks 4 km east, then 3 km north. How far is he from the starting point?
- A. 5 km ✓
- B. 4 km
- C. 7 km
- D. 6 km
Correct answer
A. 5 km
Explanation
Using the Pythagorean theorem on the 4 km and 3 km legs: the straight-line distance is the square root of (4^2 + 3^2) = 5 km.