In how many years will a sum of money doubles itself at 5% per annum on simple interest?	Choose the correct choice from the following.
A) 22 years
B) 20 years
C) 22 years
D) 31years
E) 13years
Explanation:   P = (P*5*R)/100   R = 20%   Answer: Option 20 years
<result>B</result>
In how many years will a sum of money doubles itself at 5% per annum on simple interest?