Answer :
If your money doubles in 10 years, then the interest it earned
in 10 years is 100% of the amount you invested.
If the interest is simple interest, then they paid
(100%/10 years) = 10% per year .
in 10 years is 100% of the amount you invested.
If the interest is simple interest, then they paid
(100%/10 years) = 10% per year .