Aretired couple invested $1 in bonds. at the end of one year, they received an interest payment of $690. what was the simple interest rate of the bonds?

Rate of interest = 6.9 %

Step-by-step explanation:

Given in question as,

principal invested = $10000

Interest credited = $ 690

Time taken for the Principal amount = 1 year

Now the interest is applies on simple interest

SO, simple interest =

Or, SI =

Or,  690 =

∴ Rate =

Hence Rate of interest= 6.9 %       Answer

-50/3 is the final answer! : )