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Railways Sample Paper RRB (Group D) Sample Test Paper-6

  • question_answer
    A Drum of kerosene is \[\frac{3}{4}\] full. When 30 of liters of kerosene is Drawn from it, it remains \[\frac{7}{12}\] full. The capacity of the drum is

    A)  120 l               

    B)  135 l

    C)  150 l   

    D)  180 l

    Correct Answer: D

    Solution :

    [d] Let the capacity of the drum be x liters. \[\therefore \,\,\frac{3x}{4}-\,30=\frac{7x}{12}\] \[\Rightarrow \,\,\,\frac{3x}{4}-\,\frac{7x}{12}=30\] \[\Rightarrow \,\,\,\frac{9x-\,7x}{12}=30\] \[\Rightarrow \,\,\,\frac{x}{6}=30=x=6\times 30=180\,liters\]


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