Sea water

Seawater contains about 6.5% salt. How many dm3 of distilled water must we pour into 21 dm3 of seawater to get water with 1.2% salt?

Final Answer:

V =  92.75 dm3

Step-by-step explanation:

V1​=21 dm3   6.5 % ⋅  V1​ = 1.2 % ⋅  (V1​+V) 6.5/100 ⋅  V1​ = 1.2/100 ⋅  (V1​+V)  6.5⋅ V1​=1.2⋅ (V1​+V) 6.5⋅ 21=1.2⋅ (21+V)  1.2V=111.3  V=1.2111.3​=92.75  V=4371​=92.75=92.75 dm3

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You need to know the following knowledge to solve this word math problem:

algebrabasic operations and conceptsUnits of physical quantitiesthemes, topicsGrade of the word problem

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