Resposta :
Primeiro, transformando o tempo para horas, temos:
[tex]\Delta t=20\min=\dfrac{20}{60}\;h=\dfrac{1}{3}\;h[/tex]
Agora podemos calcular:
[tex]V=\dfrac{\Delta S}{\Delta t}\Longrightarrow \Delta S=V\cdot\Delta t\Longrightarrow\Delta S=60\cdot\dfrac{1}{3}\Longrightarrow\Delta S=20\;km[/tex]
[tex]\Delta t=20\min=\dfrac{20}{60}\;h=\dfrac{1}{3}\;h[/tex]
Agora podemos calcular:
[tex]V=\dfrac{\Delta S}{\Delta t}\Longrightarrow \Delta S=V\cdot\Delta t\Longrightarrow\Delta S=60\cdot\dfrac{1}{3}\Longrightarrow\Delta S=20\;km[/tex]