Physics

Problem

A hiker walks

3\,\text{km}

north, then

4\,\text{km}

east, and finally

5\,\text{km}

south. What is the magnitude of the hiker's resultant displacement from the starting point? a)

4\,\text{km}

12\,\text{km}

4.5\,\text{km}

5\,\text{km}