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      Question

      In a 60-liter mixture of petrol

      and diesel, the ratio of petrol to diesel is given as p:1. When 8 liters of diesel is added to the mixture, the amount of diesel becomes  of the amount of petrol in the resulting mixture. Determine the value of p.
      A 2 Correct Answer Incorrect Answer
      B 8 Correct Answer Incorrect Answer
      C 4 Correct Answer Incorrect Answer
      D 5 Correct Answer Incorrect Answer
      E None of these Correct Answer Incorrect Answer

      Solution

      ATQ, Let the initial quantity of diesel = ‘d’ L So, the initial quantity of petrol = (60 – d) L From the question: (d + 8) = (60 – d) × (125/300) 12d + 96 = 300 – 5d d = 12 The initial quantity of diesel = 12 L Quantity of petrol = 60 – 12 = 48 L So, value of p = 48/12 = 4

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