[tex]\Delta t=1,5 h=1h~30min=90min=5400s \\ \\ v_m=1,5 \frac{m}{s} \\ ---------------------------- \\ \\ v_m= \frac{\Delta d}{\Delta t} \Rightarrow \Delta d= v_m \cdot \Delta t=1,5 \frac{m}{\not s} \cdot5400 \not s= 8100m=8,1km. \\ \\ In~1,5~ore~va~parcurge~8,1~km.[/tex]
