Arithmeticmedium · Past Paper
At what rate percent per annum will a sum of money double itself in 8 years using simple interest?
A12.5%
B10%
C15%
D8%
✓ Correct Answer: A — 12.5%
For doubling, I=P. P = (P*8*R)/100 => R = 100/8 = 12.5%.
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