Let the initial quantity of diesel and petrol in the mixture be 5x litres and 3x litres, respectively Final quantity of diesel in the mixture = 0.75 × 5x = 3.75x litres Final quantity of petrol in the mixture = (0.75 × 3x) + 24 = (2.25x + 24) According to the question, 2.25x + 24 = 3.75x Or, 1.5x = 24 Or, x = 16 Therefore, initial quantity of the mixture = 5x + 3x = 8x = 128 litres Hence, option c.
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