Mathematics

Problem

Calculate the speed in

\text{m s}^{-1}

of a car moving at

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

. a)

18\,\text{m s}^{-1}

25\,\text{m s}^{-1}

20\,\text{m s}^{-1}

16.2\,\text{m s}^{-1}