September 2018 2 27 Report
Zad.1 Ile litrow soku trzeba dodać do 5 litrow wody,zeby mieszanka zawierala 20% soku?
zad.2Motorowka plynać z pradem rzeki przebyla drogę12km w czasie 20 minut.Predkosc motorowki wynosi 30 km/h .oblicz predkosc pradu rzeki?prosze o dobre i zrozumiale rozwiazanie;)

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