Ramesh invested a certain sum of money at 9% per annum simple interest. If he receives an interest of ₹20,250 after one year, the sum he invested is: 

Correct option is A

Given:

Rate of interest (R) = 9% per annum

Interest received (SI) = ₹20,250

Time (T) = 1 year ​

Formula Used:  

SI = $$\frac{P \times R \times T}{100}$$ 

Solution: ​

Let P be the principal.

Then, 

​$$20250 = \frac{P\times 9 \times 1}{100} \\ \ \\ \implies P = \frac{20250 \times 100}{9} \\ \ \\\ P = 225000$$ 

Thus, Principal is ₹2,25,000