A sum of money triples itself in twelve years at simple interest. Find the rate of interest?
Choose the correct answer
A) 16 2/8%	B) 16 8/3%	C) 86 2/3%	D) 16 5/3%	E) 16 2/3%
Let the pricipal be Rs. x, then amount = 3x(where R = rate of interest)   =&gt; Interest   = 3x - x   = Rs. 2x   R = (100 * 2x)/(x * 12)   = 50/3 %   = 16 2/3%   Answer:16 2/3%
<result>E</result>
A sum of money triples itself in twelve years at simple interest. Find the rate of interest?