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b) 72 km/s zamienić na m/min
a) 108 dm/h = 108 * 10 m/ 3600 s = 0,3 m/s
b) 72 km/s = 72 * 1000 m / 60s = 1200 m/min
72km/s=72*1000/(1/60)=72000*60=4320000m/min
72km/s=72000m/1/60min=432*10do potęgi4 m/min