Explanation:

- Prashant invested Rs. 5000 in Bank A for 2 years and Rs. 3000 in Bank B for 4 years, both at the same simple interest rate.

- The total interest he received from both banks is Rs. 2200.

- For Bank A: Interest = (Principal × Rate × Time) / 100 = (5000 × Rate × 2) / 100.

- For Bank B: Interest = (Principal × Rate × Time) / 100 = (3000 × Rate × 4) / 100.

- Combined interest equation: (5000 × Rate × 2) / 100 + (3000 × Rate × 4) / 100 = 2200.

- Simplifying, we get: 100R + 120R = 2200; so, 220R = 2200.

- Solving for Rate, R = 10%.

Option 4: 10% is the correct answer.

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