What is S.I. of rs. 800 on 5% per annum for 3 years?

Options

A. a. 120
B. b. 140
C. c. 210
D. d. 230

Answer

To find the Simple Interest (SI) for Rs. 800 at a rate of 5% per annum for 3 years, we will use the formula for Simple Interest:

### Step-by-Step Solution:

1. **Identify the values:**
- Principal (P) = Rs. 800
- Rate of Interest (R) = 5% per annum
- Time (T) = 3 years

2. **Write the formula for Simple Interest:**
\[ SI = \frac{P \times R \times T}{100} \]

3. **Substitute the values into the formula:**
\[ SI = \frac{800 \times 5 \times 3}{100} \]

4. **Calculate the numerator:**
- First, calculate \(800 \times 5 = 4000\)
- Then, calculate \(4000 \times 3 = 12000\)

5. **Now divide by 100:**
\[ SI = \frac{12000}{100} = 120 \]

6. **Final result:**
- The Simple Interest (SI) is Rs. 120.

### Summary:
The Simple Interest for Rs. 800 at a rate of 5% per annum for 3 years is Rs. 120.

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