Express a speed of 54 km/hr in meters/second.

*Note*

When we convert km/h to m/s we multiply by \(\frac{5 }{ 18}\)

When we convert m/s to km/h we multiply by \(\frac{18 }{ 5}\)

54 x \(\frac{5}{18 }\) m/s

3 x 5 = 15 m/s