2. Sample Papers
  3. Railways

Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-3

  • question_answer
    A sum of money at simple interest doubles in 7 yr. It will become four times in

    A)  90 yr   

    B)  18 yr

    C)  38 yr               

    D)  21 yr

    Correct Answer: D

    Solution :

    Principal = Rs. x \[\therefore \]      \[x=\frac{x\times 7\times R}{100}\,\,\,\,\text{or}\,\,R=\frac{100}{7}\] Now, \[3x=\frac{x\times 100\times T}{7\times 100}\] .\[\therefore \]     \[T=21\,\,yr\]


You need to login to perform this action.
You will be redirected in 3 sec spinner