### In what time will the simple interest on Rs. 1750 at 9% per annum be the same as that on Rs. 2500 at 10.5% per annum in 4 years?

A. 6 years and 8 months B. 7 years and 3 months C. 6 years D. 7 years and 6 months Answer: Option A
Let time is T years. According to the question; $\begin{array}{l} \frac{1750 \times 9 \times T}{100}=\frac{(2500 \times 10.5 \times 4)}{100} \\ O r, T=\frac{2500 \times 10.5 \times 4}{1750 \times 9} \end{array}$ T = 6.66 years = 6 years and 8 months