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Railways RRB (Assistant Loco Pilot) Solved Paper-2013

  • question_answer
    In what time a sum will double itself at 20% per annum rate of interest?

    A)  2 years                        

    B)  3 years

    C)  4 years                        

    D)  5 years

    Correct Answer: D

    Solution :

     Let, principal be\[Rs.\,\,x\] then amount will be \[2x;\] then S.I. \[=2x-x=Rs.\,\,x\] Time\[=\frac{x\times 100}{x\times 20}=5\,\,years\].


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