2. Sample Papers
  3. Railways

Railways Sample Paper RRBs Assistant Loco Pilot and Technician CBT STAGE-I Sample Paper-4

  • question_answer
    At a fixed rate of simple interest an amount becomes double in 10 yr. In how many years the amount becomes triple?

    A)  15 yr

    B)         20 yr

    C)  30 yr   

    D)  12 yr

    Correct Answer: B

    Solution :

    Amount = Rs. P and it will be three times in x yr. \[\therefore \] Amount in 10 yr = Rs. P \[\therefore \] Simple interest in 10 yr \[=\,2P-P=Rs.\,P\] Rate of interest in 10 yr\[=\frac{100\times P}{P\times 10}=10%\] Interest for 3 times amount \[=3P-P\] Time \[(x)=\frac{100\times 2P}{P\times 10}=20\,\,yr\]


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