Question

1. A sum doubles itself in 6 years at compound
interest. The sum will be eight times at the
same rate of interest in
​

Answer 1

formula: n2=n1^(t2/t1)

n=number of times

t=years

n2 = 8 i.e. 2^3

n1 = 2 (doubles)

t2 = x

t1 = 4

n2=n1^(t2/t1)

2^3 = 2^(x/4)

3 = x/4

3*4 = x

12 = x

Answer 2

Explanation:

formula: n2=n1^(t2/t1)

n=number of times

t=years

n2 = 8 i.e. 2^3

n1 = 2 (doubles)

t2 = x

t1 = 4

n2=n1^(t2/t1)

2^3 = 2^(x/4)

3 = x/4

3*4 = x

12 = x