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%
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%