A solution of 60 litre of acid and water contains 65% acid. How much water must be added to get a solution of 52% acid?


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60l water contains 65% acid
Acid = 39 , water=21
Let total volume be V when additional water is added
39/V = 0.52
V=75
Additional volume = 75-60 = 15
so 15 L

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