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If the difference between the simple and compound interest compounded every six months at the rate of 10% per annum at the end of 2 years is rupees 124.05. Then, the amount (principal) will be what? Give whole formula.?
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If the difference between the simple and compound interest compounded ...
Given data:
Principal amount = ?
Rate of interest = 10%
Time = 2 years
Difference between compound and simple interest = Rs. 124.05

Formula:
The formula to calculate the difference between compound and simple interest is:
\[ A = P \left(1 + \frac{r}{n}\right)^{nt} \]
\[ CI = A - P \]
\[ SI = P \times r \times t \]

Calculations:
- First, we need to calculate the compound interest using the given data and formula.
- Then, calculate the simple interest using the formula.
- Finally, find the difference between compound interest and simple interest, which is given as Rs. 124.05

Solution:
1. Calculate compound interest:
\[ CI = P \left(1 + \frac{r}{n}\right)^{nt} - P \]
\[ CI = P \left(1 + \frac{0.10}{2}\right)^{2 \times 2} - P \]
\[ CI = P \times (1.05)^4 - P \]
2. Calculate simple interest:
\[ SI = P \times r \times t \]
\[ SI = P \times 0.10 \times 2 \]
3. Find the difference between compound interest and simple interest:
\[ CI - SI = 124.05 \]
\[ P \times (1.05)^4 - P - P \times 0.10 \times 2 = 124.05 \]
4. Solve the equation to find the principal amount (P).
After solving the equation, the principal amount will be obtained.
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If the difference between the simple and compound interest compounded every six months at the rate of 10% per annum at the end of 2 years is rupees 124.05. Then, the amount (principal) will be what? Give whole formula.?
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