Question

calcule a velocidade media de um carro que percorreu 420 km em 3 horas?

Answer 1

$\large\displaystyle\text{ \mathsf{V_m=\dfrac{\Delta S}{\Delta t} } }$

$\large\displaystyle\text{ \mathsf{ V_m=\dfrac{420\,km}{3\,h}} }$

$\large\displaystyle\text{ \boxed{\boxed{\mathsf{V_m=140\,km/h}} } }$