Ram invested a certain sum of money at simple interest. It amounted to $$\frac54$$​ of itself in 3 years. What will be its rate per cent per annum?

Correct option is B

Given:
Amount = $$\frac54$$​​
Time = 3 years
Formula Used:
Simple interest =$$\frac{P \times R \times T}{100}$$​​
Solution:
Interest = Amount - Principal=$$\frac 54 -1 = \frac14$$​​
​$$\frac14= \frac {1 \times R \times 3 }{100}$$​​

​$$R\% = \frac{100}{12} = 8.33\%$$​​