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Railways Sample Paper RRB (Group D) Sample Test Paper-13

  • question_answer
    A man sold his book for Rs. 891, thereby gaining\[\frac{1}{10}\]of its cost price. Find his cost price.

    A)  Rs. 850

    B)  Rs. 810

    C)  Rs. 851

    D)  Rs. 840

    Correct Answer: B

    Solution :

    [b] Let C. P. = Rs. x then profit = \[S.P.-\,C.P.\] \[\Rightarrow \,\,\,\frac{1}{10}\times x=891-\,x\Rightarrow \,\,\frac{11x}{10}=891\] .\[\Rightarrow x=\frac{891\times 10}{11}=Rs.\,\,810\]


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