Explanation:

- The initial sum is Rs. 2,450, and it earns Rs. 441 as interest over 3 years.

- Calculate the original interest rate (x%) using the formula for simple interest.

- Simple Interest (SI) = Principal (P) × Rate (R) × Time (T) / 100

- So, 441 = 2450 × x × 3 / 100.

- Solving for x gives: x = (441 × 100) / (2450 × 3) = 6%.

- The new rate becomes (x + 3)% = 6 + 3 = 9%.

- Calculate the new interest for the same period using 9%:

- New Simple Interest = 2450 × 9 × 3 / 100 = Rs. 661.5.

- Hence, the correct option is Option 5: Rs. 661.5.

Answer: Rs. 661.5