Question

At what rate percent pa will be SI on a sum of money be $\frac{2}{5}$ of amount in 15 years?

• A. $\frac{8}{3}$%
• B. $\frac{7}{3}$%
• C. $\frac{8}{5}$%
• D. None

Answer 1

The correct option is A $\frac{8}{3}$%

Let $sum=x$, $T=15$ years, $SI=2/5x$, $R=\frac{100\times \frac{2}{5}x}{15\times x}$
$R=\frac{200}{75}=\frac{8}{3}$%