A sum of money at simple interest amounts to Rs. 815 in 3 years and to Rs. 854 in 4 years. The sum is : ____ ? November 25, 2023 – by admin 0A. Rs. 650B. Rs. 698C. Rs. 700D. Rs. 690Therefore, the Principal amount = R s . 815 – R s . 117 = R s . 698.