1) A sum fetched a total simple interest of Rs. 5025 at the rate of 10 p.c.p.a. in 7 years. What is the sum ? A) 7100 B) 7178.57 C) 7180.50 D) 8025 E) 9000 Answer: Option BExplanation:Principal Rs $=\frac{(100\times 5025)}{(7\times 6)}$ $=\frac{502500}{70}$ = Rs. 7178.57