Calculate the simple interest if Rs. 1800 is invested for 10 years at a rate of 5% per annum.
A. Rs 900 B. Rs 450 C. Rs 1800 D. Rs 2700

Options

A. A
B. B
C. C
D. D

Answer

To calculate the simple interest, we will use the formula for simple interest:

**Simple Interest (SI) = (Principal × Rate × Time) / 100**

Where:
- Principal (P) = Rs. 1800
- Rate (R) = 5% per annum
- Time (T) = 10 years

Now, let's substitute the values into the formula:

1. **Substituting the values:**
\[ SI = \frac{1800 \times 5 \times 10}{100} \]

2. **Calculating the multiplication in the numerator:**
\[ SI = \frac{1800 \times 50}{100} \]

3. **Calculating the product:**
\[ SI = \frac{90000}{100} \]

4. **Dividing to find the simple interest:**
\[ SI = 900 \]

Thus, the simple interest earned on Rs. 1800 invested for 10 years at a rate of 5% per annum is **Rs. 900**.

**Final Answer: A. Rs 900**

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