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      Question

      In a mixture, the quantity of salt is 40% of the

      quantity of water. On removing 90 litres mixture and adding 20 litres each of salt and water, the quantity of salt becomes 30 litres less than that of water in the final mixture. Find the final quantity of water.
      A 10 Correct Answer Incorrect Answer
      B 44 Correct Answer Incorrect Answer
      C 23 Correct Answer Incorrect Answer
      D 70 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, After removal of 90 litres of mixture, Let the initial quantity of water be '100b' litres. Initial quantity of salt = 0.4 × 100b = '40b' litres. ATQ, 100b - 40b = 30 Or, 60b = 30 Or, 'b' = 30/60 = 0.5 Therefore, final quantity of water = 100b + 20 = 100 × 0.5 + 20 = 50 + 20 = 70 litres

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