Railways RRB (Assistant Loco Pilot & Technician) Solved Paper-2 (2013)

  • question_answer
    Shyam invests an amount of Rs.5690 at the rate of 5% per annum for 3 yr. What approximate amount of compound interest will be obtain at the end of 3 yr?

    A)  Rs. 854    

    B)  Rs. 799    

    C)  Rs. 843    

    D)  Rs. 897

    Correct Answer: D

    Solution :

    Compound Interest =56901 \[\left[ {{\left( 1+\frac{5}{100} \right)}^{3}}-1 \right]\] \[=5690\left[ {{\left( \frac{105}{100} \right)}^{3}}-1 \right]\] \[=5690\times \left[ \left( \frac{21}{20}\times \frac{21}{20}\times \frac{21}{20} \right)-1 \right]=5690\times \left( \frac{9261}{8000}-1 \right)\] \[=\frac{5690\times 1261}{800}=Rs.\,896.88\approx Rs.897\]


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