In certain years a sum of money is doubled itself at $6 \frac{1}{4} \%$ simple interest per annum, then the required time (In $years$) will be
In certain years a sum of money is doubled itself at $6 \frac{1}{4} \%$ simple interest per annum, then the required time (In $years$) will be
- A
$12.5$
- B
$8$
- C
$25$
- D
$16$
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