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      Question

      A container holds 336 ml of a solution of juice and

      water, mixed in the ratio 7:5. How much water must be added to this solution so that the ratio of juice to water becomes 7:6?
      A 28 ml Correct Answer Incorrect Answer
      B 20 ml Correct Answer Incorrect Answer
      C 18 ml Correct Answer Incorrect Answer
      D 32 ml Correct Answer Incorrect Answer

      Solution

      ATQ,

      Initial quantity of juice = (7/12) × 336 = 196 ml Initial quantity of water = 336 - 196 = 140 ml Let the quantity of water added = x ml ATQ, 196 / (140 + x) = 7 / 6 ⇒ 140 + x = (196 × 6) / 7 = 168 ⇒ x = 168 - 140 = 28 ml

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