[tex]\Large\boxed{\begin{array}{l}\sf\Delta t=4min\div60=\dfrac{1}{15}h\\\\\sf v=60\,km/h\\\\\sf \Delta s=v\cdot\Delta t\\\sf\Delta s=60\cdot\dfrac{1}{15}\\\\\sf \Delta s=\dfrac{60}{15}\\\\\sf\Delta s=4\,km\end{array}}[/tex]