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10th Class Mathematics Related to Competitive Exam Question Bank Commercial Mathematics

  • question_answer
    A certain sum of money lent out at S.I. amounts to Rs. 6900 in 3 years and Rs. 7500 in 5 years The sum lent is

    A)  Rs. 4000              

    B)  Rs. 4500

    C)  Rs. 5000        

    D)         Rs. 6000  

    Correct Answer: D

    Solution :

     S.I. for 2 years \[=(7500-6900)=Rs.600\] S.I. for 3 years \[=Rs.\,\,\left( \frac{600}{2}\times 3 \right)\]                 \[=Rs.\,\,900\] \[\therefore \] Principal \[=Rs.\,\,(6900-900)\]                 \[=Rs.\,\,6000\]


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