In what time will ₹ 1000 becomes ₹ 1331 at 10% per annum

Here , P = ₹ 1000, P₁ = ₹ 1331 , r = 10%
Let the required time be n years. Then,
Using the given formula ,

	∴ P₁ = P		1 +	r		ⁿ
				100

1331 = 1000		1 +	10		ⁿ
			100

⇒	1331	=		10 + 1		ⁿ
	1000			10

⇒		11		ⁿ	=		11		³
		10					10

Equating on both sides , we get
⇒ n = 3

2	1	years
	2

3	1	years
	2