[tex]\large{\begin{array}{l}\sf4\,min\cdot60=240\,s\\\\\sf V_m=\dfrac{\Delta S}{\Delta t}\\\\\sf V_m=\dfrac{1200\,[m]}{240\,[s]}\\\\\boxed{\boxed{\sf V_m=5\,\bigg[\dfrac{m}{s}\bigg]}}\leftarrow\textsf{velocidade media em metros por segundo}\end{array}}[/tex]
