7th Class Mathematics Comparing Quantities Question Bank Comparing Quantities

  • question_answer
    Shyamlal deposited Rs 2 lakh in his bank at an simple rate of interest =9% per annum. The bank owner claims that after 6 years his money will be more than \[1.5\] times his original amount. He further claims that after 10 years, his money will be more 2 times the original amount. Which of the following is correct.

    A)  Both first and second claims are true

    B)  Only first claim is true

    C)  Only second claim is true.          

    D)  Neither of the claims is true.

    Correct Answer: B

    Solution :

    (b) After 6 yrs, interest \[=\frac{200000\times 9\times 6}{100}\] \[=108000\] \[\Rightarrow \] amount = \[200000+10800-30800\] Which is greater than \[1.5\] times 2 lakh. After 10 yrs. Interest \[=\frac{2lakh\times 9\times 10}{100}=1.8\,\,lakh\] \[\therefore \] Amount \[=2+1.8=3.8\] lakh but this is less than 2 times original amount.

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