At what rate percent per annum will a sum of money double in 16years?
Choices:
A) 10.6%	B) 3.65%	C) 6.25%	D) 8.32%	E) 11%
Let principle = P   S.I. = P   T = 16yrs   Rate = 100*P/P*16 = 25/4= 
<gadget id="calculator">25/4</gadget>
<output>25/4 = around 6.25</output>
6.25%   Answer is 6.25%
<result>C</result>
At what rate percent per annum will a sum of money double in 16years?