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

  • question_answer
    Let Rs. 300 be borrowed for 8 months. Then which one of the following will be the correct period of lending of Rs. 400 in return, provided the rate of interest in both the cases is same and the interest received in each case the same?

    A)  4 months       

    B)         5 months

    C)  \[5\frac{1}{2}\] months     

    D)         6 months  

    Correct Answer: D

    Solution :

     Let the rate of interest be x% and let. Rs. 400 be lended for y months. Then     \[\frac{x}{100}\times 8\times 300=\frac{x}{100}\times y\times 400\]or\[y=6\]


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