Question

Um móvel viaja com velocidade constante de 142,5 km/h quantas horas ele gasta para percorrer 578 km ?

Answer 1

$t=\frac{d}{v}\\ \\ t=\frac{578}{142,5}=4,05 \ h$

Answer 2

$\large\boxed{\boxed{\begin{array}{l}\sf V_m=\dfrac{\Delta S}{\Delta t}\iff\Delta t=\dfrac{\Delta S}{V_m}\\\\\sf \Delta t=\dfrac{578}{142{,}5}\\\\\sf\Delta t\approx4{,}05\,h\end{array}}}$