Q. A sum doubles itself at simple interest in 8 years. The rate of interest per annum is

(A) 10%
(B) 12.5%
(C) 15%
(D) 8%

✅ Correct Answer: (B) 12.5%

Explanation: For doubling, SI = Principal. Rate = (100 × 1)/8 = 12.5%.

Published by Roshan ⭐ 3.43K Points at 05-Jul-2026 07:27 am in Math

Explanation by: Roshan

For doubling, SI = Principal. Rate = (100 × 1)/8 = 12.5%.

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