Salt

Seawater contains 5% salt. How many kilograms of fresh water must be added to 40 kg of seawater so that the salinity drops to 2%?

Final Answer:

x =  60 kg

Step-by-step explanation:


40·0.05 = 0.02 · (40+x)

0.02x = 1.2


x = 1.2/0.02 = 60

x = 60

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