Respuesta :

ΔS  = 8.0 km

ΔT = 1.25 h

Vm  =  ΔS / ΔT

Vm = 8.0 / 1.25

Vm = 6.4 Km/h

hope this helps!
8/1.25 = 6.4 kmph
The answer is 6.4 kilometers per hour