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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-9

  • question_answer
    In how many years, a certain sum doubles itself at 4% per annum simple interest?

    A)  5 yr                 

    B)  10 yr

    C)  20 yr   

    D)  25 yr

    Correct Answer: D

    Solution :

    \[(2P-P)=\frac{P\times 4\times t}{100}\] \[\Rightarrow \]   \[1=\frac{4t}{100}\] \[\Rightarrow \]   \[\,t=25yr\]


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