Answer:
The interest rate is 4% per annum.
Explanation:
Let the interest rate that I am getting is r% per annum.
So, my $5000 investment becomes $6200 after getting r% simple interest for 6 years.
So, from formula of simple interest we can write
⇒
⇒
⇒ r = 4%
Therefore, the interest rate is 4% per annum. (Answer)