The compound interest on Rs. 1000 at 10% per annum for 3

Here , Principal ( P ) = Rs. 1000 , Compound Interest ( CI ) = ? , Rate ( R ) = 10% , Time = 3 years
Using the given formula ,

C.I. = P			1 +	R		^T	− 1
				100

C.I. = 1000			1 +	10		³	− 1
				100

C.I. = 1000			1 +	1		³	− 1
				10

C.I. = 1000			11		³	− 1
			10

C.I. = 1000		1331	− 1
		1000

⇒ C.I. =	1000 × 331	= Rs. 331
	1000