In how many years will a sum of money double itself at 62%

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In how many years will a sum of money double itself at 6 2 %
3
simple interest per annum ?

Let principal is P.
As we know that ,

Time =	SI × 100
	Principal × Rate

Time =	P × 100	= 16 years
	P × (25 ÷ 4)

Second method to solve this question :

T =	(n - 1)	years
	R%

T =	(2 - 1)	× 100 years
	25÷4

T = 16 years.