The simple interest on a certain sum of money for 2 years

The simple interest on a certain sum of money for 2 years at 5% is Rs. 1600. The compound interest at the same rate after 3 years interest compound annually, is

As we know that ,

Principal =	S.I. × 100
	Time × Rate

Principal =	1600 × 100	= Rs. 16000
	5 × 2

C.I. = P			1 +	R		^T	− 1
				100

C.I. = 16000			1 +	5		³	− 1
				100

C.I. = 16000			21		³	− 1
			20

C.I. = 16000		9261	− 1
		8000

C.I. =	16000 × 1261	= Rs. 2522
	8000