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daca 6 robinete umplu un bazin in 24 de ore, in cat timp va fi umplut bazinul de catre 8 robinete de acelasi fel?

Răspuns :

6r........24h
8r.........x

X=(6x24):8
X=144:8
X=18h
6 *24=144
144:8=18
in 18 ore