Q. A sum doubles itself at simple interest in 8 years. The rate of interest per annum is
✅ Correct Answer: (B)
12.5%
Explanation: For doubling, SI = Principal. Rate = (100 × 1)/8 = 12.5%.
Explanation by: Roshan
For doubling, SI = Principal. Rate = (100 × 1)/8 = 12.5%.