This problem involves calculating the profit made from a financial transaction where a principal amount is borrowed at a simple interest rate and then lent out at a compound interest rate. We need to find the difference between the interest earned (compound) and the interest paid (simple) over the specified period.
First, let's calculate the simple interest A has to pay to B.
The formula for Simple Interest is:
$$SI = \frac{P \times R \times T}{100}$$Where:
Plugging the values into the formula:
$$SI = \frac{58000 \times 8 \times 2}{100}$$ $$SI = 580 \times 16$$ $$SI = ₹9,280$$So, A pays $₹9,280$ as simple interest to B.
Next, let's calculate the amount A receives from C using compound interest.
The formula for the Amount (A) compounded annually is:
$$A = P \left(1 + \frac{R}{100}\right)^T$$Where:
Calculating the total amount received after 2 years:
$$A = 58000 \left(1 + \frac{10}{100}\right)^2$$ $$A = 58000 \left(1 + 0.1\right)^2$$ $$A = 58000 \left(1.1\right)^2$$ $$A = 58000 \times 1.21$$ $$A = ₹70,180$$Now, we calculate the compound interest earned by A:
$$CI = \text{Amount} (A) - \text{Principal} (P)$$ $$CI = 70180 - 58000$$ $$CI = ₹12,180$$So, A earns $₹12,180$ from C as compound interest.
The profit earned by A is the difference between the compound interest received from C and the simple interest paid to B.
Profit = CI - SI
Profit = $12,180 - 9,280$
Profit = $₹2,900$
Therefore, A earned $₹2,900$ in the transaction at the end of 2 years.
The difference between the compound interest and simple interest for the amount ₹5,000 in 2 years is ₹50. The rate of interest is:
Amit had invested same amount of sums at simple as well as compound interest, compounded annually. The time period of investment for both the sums was 2 years and rate of interest too was the same, 4% per annum. At the end, he found a difference of ₹43 in both the interests received. What were the sums (in ₹) invested?
When the difference between compound interest, compounded annually, and simple interest for three years is ₹186 at 10% interest per annum, the principal is ₹______.