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Find the time after which the simple interest on a sum of money will be double of the sum, at the rate of 10% per annum.?
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Find the time after which the simple interest on a sum of money will b...
Understanding Simple Interest
Simple interest (SI) is calculated using the formula:
SI = P * R * T
Where:
- P = Principal amount (the initial sum of money)
- R = Rate of interest (annual percentage)
- T = Time (in years)
To find the time after which the simple interest will be double the sum, we set up the equation as follows:
Setting Up the Equation
- We want the SI to equal double the principal (2P).
- Using the formula, we can write:
2P = P * R * T
When we simplify this equation, we remove P from both sides (assuming P is not zero):
2 = R * T
Substituting the Rate
- Given that R = 10% per annum, we convert this to a decimal:
R = 10/100 = 0.10
Now, substituting this into the simplified equation:
2 = 0.10 * T
Solving for Time
To find T, we rearrange the equation:
T = 2 / 0.10
Calculating this gives:
T = 20 years
Conclusion
Thus, the time after which the simple interest on a sum of money will be double the sum at a rate of 10% per annum is:
- 20 years
This means if you invest a sum at 10% interest, it will take 20 years for the interest earned to equal the principal amount.
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Find the time after which the simple interest on a sum of money will be double of the sum, at the rate of 10% per annum.?
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