Subject

    Quantitative Aptitude

    Topic

    Miscellaneous

    729 litres of a mixture contains sprit and water in the ratio 7 : 2. How much water is to be added to get a new mixture containing spirit and water in the ratio 7 : 3?

    ক)
    60 l
    খ)
    81 l
    গ)
    92 l
    ঘ)
    120 l
    ঙ)
    None of these

    Explanation

    Spirit : water = 7 : 2 ⇒ Spirit =77+2×729=567l= \frac{7}{{7 + 2}} \times 729 = 567l And, water = 729 – 567 = 162 litre Now, let water mixed = ‘x’ litre ∴ According to the question – ⇒ 567/(162+x) = 7/3 ⇒ x = 81 litres. Hence, the required answer is 81 litre

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