Respuesta :

Samawati

Answer:

4 years

Explanation:

Simple Interest is calculated using the formula below

I= P x r x t

Where I = Interest

p= principal

r= interest rate

t= time in years

In this case

I=81

p=450

r=4.5 % or 0.045

t=???

Therefore;

81= 450 x 0.045 x t

81=20.25t

t=81/20.25

t=4

It will take four years