A person invested a sum of Rs 10,500 at x% per annum at simple interest and a sum of Rs 13,500 at (x + 2)% p.a. at simple interest. If the total interest earned on both the investments for 3 years is Rs 7,650, then the rate of interest on the first investment is:

Options

A. `8%`
B. `8.5%`
C. `9%`
D. `9.5%`

Answer

D