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Railways R.R.C.(Ranchi) Solved Paper Held on 24-11-2013

  • question_answer
    If Rs. 1 gives an interest of Rs. 9 in 60 years at simple interest, the rate % per annum is?

    A) \[13\,\,\frac{1}{3}%\]                

    B) \[12%\]

    C) \[15%\]             

    D) \[18%\]

    Correct Answer: C

    Solution :

    Principal=Rs. 1 S.I. = Rs. 9 Let rate % per annum=r Then,     S.I.=\[\frac{\Pr incipal\times rate\times time}{100}\] \[9=\frac{1\times r\times 60}{100}\] \[r=\frac{9\times 100}{60}\] \[r=15%\]


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