Physics

Problem

A hiker moves

4\,\text{km}

east, then

3\,\text{km}

north, and finally

4\,\text{km}

west. What is the magnitude of his displacement from the starting point? a)

8.5\,\text{km}

11\,\text{km}

3\,\text{km}

5\,\text{km}