Question

At what percent of simple interest will a sum of money double itself in 15 years?

Answer 1

Answer:

try 9%

Step-by-step explanation:

try by rule of 72 and divide it by 72

Answer 2

Answer:

$rate \: of \: intrest \: = 6.67 \: (approx)$

Step-by-step explanation:

Let the money = x

Therefore S. I = x

Time = 15 years

$rate \: of \: intrest \: = \frac{si \times 100}{p \times t}$

$\frac{x \times 100}{x \times 15}$

$\frac{100}{15}$

$6.666666667$

$6.67$