In what time a sum of money double itself at 5% per annum simple interest?	Choose the correct choice:
A) 33 1/8%
B) 20%
C) 83 1/3%
D) 33 4/3%
E) 73 1/3%
P = (P*5*R)/100   R = 20%   Answer:20%
<result>B</result>
In what time a sum of money double itself at 5% per annum simple interest?