- A12.5
- B8
- C10
- D25
Step-by-Step Solution
Doubling means SI = principal, i.e. 100% in 8 years, so the rate is 100/8 = 12.5% per annum.
Answer: A) 12.5
If a sum of money doubles itself in 8 years at simple interest, what is the rate of interest per annum? (answer in %)
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