Mathematics

Problem

Find the length of the arrow required to draw the velocity of wind blowing at

40\,\text{km h}^{-1}

towards south-west if the chosen scale is

1\,\text{cm}

10\,\text{km h}^{-1}

. a)

3\,\text{cm}

4\,\text{cm}

5.7\,\text{cm}

2\,\text{cm}