Answer: the simple interest at 6% is $300
Explanation:
The formula for determining simple interest is expressed as 
I = PRT/100
Where 
I represents interest paid on the loan.
P represents the principal or amount taken as loan
R represents interest rate
T represents the duration of the loan in years.
From the information given, 
P = 1000
R = 6%
T = 5 years
I = (1000 × 6 × 5)/100 = $300