In how many years will a sum of money doubles itself at 18% per annum on simple interest?
Choices.
A) 5.9%	B) 5.5%	C) 6%	D) 6.4%	E) 7.5%
P = (P*18*R)/100   R = 5.5%   Answer:5.5%
<result>B</result>
In how many years will a sum of money doubles itself at 18% per annum on simple interest?