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Przelicz jednostki prędkości
1. 5m/s = ........................km/h
2. 25 m/s= ........................km/h
3. 17 m/s ........................km/h
4. 108 km/h = ................m/s
5. 72 km/h = .................m/s
6 . 80 km/h=.................m/s