Multiple choice Compound interest for 2 years at the rate of 4% per annum on Rs 1000 is Rs 80 Rs 81 Rs 81.60 Rs 89.60 Reveal answer Fill a bubble to check yourself C Correct answer Explanation CI = P * ((1+R/100)^n - 1) = 1000 * ((1.04)^2 - 1) = 1000 * (1.0816 - 1) = 1000 * 0.0816 = 81.60. AI explanation AI 1 Using the two-year compound interest formula, the interest is calculated as 1000 times 0.04 squared plus 1000 times 0.04. This gives 1.60 plus 40, which equals 81.60 rupees. Thanks Wrong explanation