W jakim czasie gołąb pokona 120 km, jeśli w ciągu godziny lotu pokonuje 90 km ??
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1h---90km
xh---120km
x=1h*120km/90km
x=1 1/3h
1 1/3h=60min+1/3*60min=60min+20min=80min
s= 120 km
v=90 km/h t=?
v=s/t
v=120 km :90 km/h =1,5 h