Question

a certain sum was invested on simple interest. th amount to which it had grown in 5 years was 5/4 times the amount to which it had grown in 3 years. The percentage rate of interest is?​

Answer 1

Answer:

12.5%

Step-by-step explanation:

let the sum after 3 years be X.

sum after 5 years be 5/4X.

time period  = 2 years.

principal = X

amount = 5/4x.

interest = 5/4X - X.  = 1/4X.

I = P * R * T/ 100

1/4X = X * R * 2 / 100.

R = 50 / 4.

= 12.5%.

THE ANSWER IS 12.5% . PLEASE MARK IT AS THE BRAINLIEST ANSWER.

IT WOULD BE MY PLEASURE