If the difference between the compound interest and the

If the difference between the compound interest and the simple interest on a certain sum at the rate of 5% per annum for 2 years is Rs. 20, then the sum is :

Here , Principal = ? , C.I. - S.I. = Rs. 20 , Time = 2 years , Rate = 5%

For 2 years, C.I. – S.I. =	PR²
	10000

⇒ 20 =	P × 5 × 5
	10000

⇒	P	= 20
	400

⇒ P = Rs. (20 × 400) = Rs. 8000