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    Question

    if 70 liters of milk solution contains 60% milk, how

    much milk should be added to make the solution 80% milk?
    A 70 Correct Answer Incorrect Answer
    B 45 Correct Answer Incorrect Answer
    C 56 Correct Answer Incorrect Answer
    D 60 Correct Answer Incorrect Answer

    Solution

    Current Milk in Solution= 60% of 70 liters = 42 liters of milk.   Let x be the amount of milk to add- New total solution volume = 70+ x liters. New milk amount = 42+ x liters. ATQ- (42+x)/(70+x) =0.80 42+x =0.80 (70+x) 42+x =56+.80x .20x =14 =14/.20 x =70 liters.

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