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in 5 galeti incap 6 l de apa. cati litri de apa incap in 6 galeti?

Răspuns :

6l=6000ml
6000:5=1200ml intr-o galeata(1.2l)
in 6 galeti incap
1200x6=7200ml=7.2 litri
Regula de 3 simpla
5 galeti.......6 litri
6 galeti.......x litri
marimi direct proportionale
5/6=6/x
x= 6×6/5
x= 36/5
x= 7,2 litri