Question

a sum of money double itself in 7 year .find the rate of interest per annum.​

Answer 1

Answer:

100/7 %

Step-by-step explanation:

let the principle be 'x' . (p = x)

t = 7 years

A = 2x

S.I = 2x-x = x

$rate = \frac{x * 100}{x * 7}$

$= \frac{100}{7} % ans$  %

Answer 2

Answer:

Step-by-step explanation

Let principal be X

Amount=2x

SI=2x-x=x

Rate of interest=x*100/x*7

=100/7

=14.28%

Hope it helped you!!!