How many litres of water should be added to 7.5litres mixture of acid and water containing acid and water in ratio 2:1 such that resultant mixture has 20% acid in it
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So the water that should be added is 5 litres to make acid as 20% of mixture.
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1/3*5-1=2/3 should be add 3is stand for 7.5ltr so 5ltr ans
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