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    Question

    A 130-litre mixture contains petrol and water, only in

    ratio 8:5, respectively. How much water should be added in the mixture so that the quantity of water becomes 50% of quantity of resultant mixture?
    A 35 litres Correct Answer Incorrect Answer
    B 40 litres Correct Answer Incorrect Answer
    C 30 litres Correct Answer Incorrect Answer
    D 45 litres Correct Answer Incorrect Answer
    E 50 litres Correct Answer Incorrect Answer

    Solution

    Quantity of water in the initial mixture = 130 × (5/13) = 50 litres Quantity of petrol in the initial mixture = 130 × (8/13) = 80 litres Since, we’re not adding petrol, 130 litres of petrol will represent 50% of the new mixture. So, total quantity of resultant mixture = 130 ÷ 0.5 = 160 litres Quantity of water to be added = 160 – 130 = 30 litres

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