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SSC Sample Paper SSC (Group-C) Sample Test Paper-6

  • question_answer
    The value of a machine depreciates every year at the rate of 10% on its value at the beginning of that year. If the current value of the machine is Rs. 729, its worth 3 years ago was:

    A)  Rs.1000                     

    B)  Rs. 750.87

    C)  Rs. 947.10       

    D)      Rs. 800

    Correct Answer: A

    Solution :

     If the price of machine 3years ago be Rs. x then \[729=x{{\left( 1-\frac{10}{100} \right)}^{3}}\]             \[\Rightarrow \]            \[729=x\times {{\left( \frac{9}{10} \right)}^{3}}\]             \[\Rightarrow \]            \[x=Rs.\,1000\]


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