At what rate percent on simple interest will a sum of money double itself in 30 years?\nOptions:\n(A) 3 1/3%\n(B) 3 1/6%\n(C) 3 1/5%\n(D) 3 5/3%\n(E) 7 1/3%
Let’s work this out in a step by step way to be sure we have the right answer.
(A)
P = (P*30*R)/100\nR = 3 1/3%.

The answer is (A)