If Meena gives an interest of Rs 45 for one year at 9% rate p.a.. What is the sum she has borrowed?

Explanation

To find the sum Meena has borrowed (the principal amount), we can use the formula for calculating simple interest:

**Step 1: Write down the formula for Simple Interest (SI)**
The formula for Simple Interest is:
\[ \text{SI} = \frac{P \times R \times T}{100} \]
Where:
- \( SI \) = Simple Interest
- \( P \) = Principal amount (the sum borrowed)
...