The simple interest on a sum for 5 years is Rs 16800. The rate of interest for the first 3 years is 8% per annum and for the next 2 years is 12% per annum. What is the value (in Rs) of sum?

Options

A. 30000
B. 38000
C. 32000
D. 35000

Explanation

To solve the problem step by step, we need to find the principal sum based on the given simple interest over 5 years with varying interest rates.

### Step 1: Understand the given information
- Simple interest for 5 years = Rs 16,800
- Rate of interest for the first 3 years = 8% per annum
- Rate of interest for the next 2 years = 12% per annum

### Step 2: Calculate the total interest for each period
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