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a fost răspuns

Despre 2 robinete stim ca primul umple singur un bazin in 3 ore,iar al 2 lea umple singur acelasi bazin in 6 ore.In cate ore cele doua robinetre curgand impreuna pot umple bazinul?

Răspuns :

Renatemambouko
cmmmc [3,6] = 18

primul robinet umple in 18 ore   6 bazine   18/3=6 bazine
al doilea robinet umple in 18 ore                18/6=3 bazine

6+3 = 9 bazine in  18 ore
18 ore / 9 = 2 ore

in doua ore daca curg ambii robineti se umple bazinul