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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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