Subject

    Quantitative Aptitude

    Topic

    Percentage

    In some quantity of ghee, 60% is pure ghee and 40% is vanaspati. If 10 kg of pure ghee is added, then the strength of vanaspati ghee becomes 20%. The original quantity was :

    ক)
    10 kg
    খ)
    15 kg
    গ)
    20 kg
    ঘ)
    25 kg

    Explanation

    Let the original quantity be x kg. Vanaspati ghee in x kg  =  (40x  ÷\div  100 )kg = (2x  ÷\div  5) kg. Now, (2x ÷\div 5) ÷\div (x + 10) = 20 ÷\div 100 => 2x  ÷\div  (5x + 50) = 1 ÷\div 5 => 5x = 50 => x = 10.

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