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Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-1

  • question_answer
    The difference between the compound interest and simple interest on a certain sum for 2 yr at the same rate of interest of 10% per annum is Rs. 42. The sum is

    A)  Rs. 4200          

    B)         Rs. 42000

    C)  Rs. 420

    D)  Rs. 4500

    Correct Answer: A

    Solution :

    For 2 yr, Difference between CI and \[SI=\frac{P{{R}^{2}}}{{{\left( 100 \right)}^{2}}}\] \[\Rightarrow \,\] \[\frac{P\times 100}{100\times 100}=42\] \[\therefore \]      P = Rs. 4200.


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