Find the compound interest on Rs 1000 at the rate of 10% per annum for 18 months when interest is compounded half-yearly.

Explanation

To find the compound interest on Rs 1000 at the rate of 10% per annum for 18 months when interest is compounded half-yearly, we can follow these steps:

### Step 1: Identify the values
- Principal (P) = Rs 1000
- Rate of interest (R) = 10% per annum
- Time (T) = 18 months = 1.5 years

### Step 2: Convert the time period into half-year periods
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