Physics

Problem

A bus travels

30\,\text{km}

east in

30\,\text{min}

and then a further

20\,\text{km}

east in

40\,\text{min}

. What is the magnitude of the bus’s average velocity for the whole journey? a)

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

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

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

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