Question

The rate at which a sum becomes four times of itself in 15 years at S.I. will be:

• A. 15%
• B. $17\frac{1}{2}\%$
• C. 20%
• D. 25%

Answer 1

The correct option is C 20%

Let sum = x, Then, S.I. = 3x

$\therefore Rate=\left(\frac{100\times 3x}{x\times 15}\right)\%=20\%$