SSC MTS 2022 PYQ — Question 61

The correct answer is option 2 i.e. 4 years

Let the sum of money be P and, time be T years-

So,

Simple Interest = $\left ( \frac{P\times R\times T}{100} \right )$

Since, the amount of money doubles itself -

So, 

Simple Interest = P 

$\therefore P=\left ( \frac{P\times R\times T}{100} \right )$

$P=\left ( \frac{P\times 25\times T}{100} \right )$

$T=4$

So, the amount of money will double itself in 4 years.