In how many years will a sum of money doubles itself at 5% per annum on simple interest?	Choose the correct choice
A) 11%
B) 20%
C) 12%
D) 19%
E) 14%
P = (P*5*R)/100   R = 20%   Answer:20%
<result>B</result>
In how many years will a sum of money doubles itself at 5% per annum on simple interest?