Detailed explanation and options for the selected question.
A man walks 5 km south, then 4 km east. How far is he from his starting point?
A.
5 km
B.
6.4 km
C.
9 km
D.
4.5 km
Explanation:
Using the Pythagorean theorem, the displacement forms a right triangle. Hypotenuse = √(5^2 + 4^2) = √41 ≈ 6.4 km. Other options miscalculate the displacement.