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A sum of money becomes eight times of Itself in 3years at compound interest.The rate of Interest per annum is

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A sum of money becomes eight times of Itself in 3years at compound interest.The rate of Interest per annum is
1). 100%
2). 80%
3). 20%
4). 10%

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2 answers

1 vote
Answered by on | Votes 1 |
This question was asked some where in previous year papers of ssc, and correct answer was 100%

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0 vote
Answered by on | Votes 0 |

Let the principal be x and the
rate of compound interest be r%
per annum. Then,

8x = $\frac{X(1+r^{3})}{100}$

2 = $\frac{(1+r^{})}{100}$

R = 100%

Accepted Answer