The difference between C I and S I for 2 years at 10% rate

The difference between C I and S I for 2 years at 10% rate of interest is Rs. 4. Find the sum of money.

Given in question , Difference = C.I. - S.I. = ₹ 4 , Time = 2 years , Rate = 10%
Using the given formula ,

Difference =	PR²
	10000

⇒ 4 =	P × 10 × 10
	10000

⇒ P = Rs. 400