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NTSE Sample Paper NTSE SAT Practice Test-15

  • question_answer
                             A sum of money at simple interest amounts to Rs 1012 in \[2\frac{1}{2}\]years and to Rs 1067.20 in 4 years. The rate of interest per annum is

    A) 2.5%                            

    B) 3%                    

    C) 4%        

    D) 5%                

    Correct Answer: C

    Solution :

    [c] S.I for \[1\frac{1}{2}\]years = Rs. \[\left( 1067.20 \right)\text{ }-\]Rs. 1012 =Rs. 55.20. \[\therefore \] S.I for \[2\frac{1}{2}\] years = Rs.\[55.20\times \frac{2}{3}\times \frac{5}{2}\]  = Rs.92.   \[\Rightarrow \]Principal = Rs. \[\left( 1012-92 \right)\]= Rs. 920 \[\therefore \] rate % \[=\frac{100\times 92}{920\times 5}=4%\]                 


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