Physics

Problem

A scooter travels

18\,\text{km}

40\,\text{min}

and then

12\,\text{km}

20\,\text{min}

. Calculate its average speed for the whole journey. a)

36\,\text{km/h}

30\,\text{km/h}

31.5\,\text{km/h}

24\,\text{km/h}