At what rate percent per annum will a sum of money double in 6 years.
Choose the correct choice from the following choices.
A) 12.5%  B) 13.5%  C) 11.5%  D) 14.5%  E) 16.6%
Let principal = P, Then, S.I.=P and Time=8 years   Rate = [(100 x P)/ (P x 6)]% = 16.6% per annum. Answer: 16.6%
<result>E</result>
At what rate percent per annum will a sum of money double in 6 years.