7th Class Mathematics Comparing Quantities Question Bank Comparing Quantities

  • question_answer Mayur and Vishal borrowed Rs. 2250 and Rs. 2500 respectively at the same rate of simple interest for 3 years. If the interest paid by Vishal is Rs. 45 more than that paid by Mayur, what is the rate of interest per annum?

    A) \[3%p.a.\]                     

    B) \[4%p.a.\]

    C) \[5%p.a.\]                     

    D) \[6%p.a.\]

    Correct Answer: D

    Solution :

    (d) Let interest rate be r. Interest (Mayur) \[=\frac{2250\times r\times 3}{100};\] Interest (Vishal) \[=\frac{2500\times r\times 3}{100}\] \[\Rightarrow \]\[\frac{3r}{100}\left( 2500-2250 \right)=45\] \[\Rightarrow \]\[r=\frac{4500}{3\times \left( 250 \right)}=6\]

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