Multiple choice Simple interest on Rs. 400 at the rate of 15% after 18 months will be Rs. 180 Rs. 90 Rs. 45 Rs. 270 Reveal answer Fill a bubble to check yourself B Correct answer Explanation Simple interest = (P * R * T) / 100. P = 400, R = 15%, T = 18 months = 1.5 years. SI = (400 * 15 * 1.5) / 100 = 4 * 15 * 1.5 = 90. AI explanation AI 1 Using the simple interest formula, the interest is calculated as (400 * 15 * 1.5) / 100, where 18 months is 1.5 years. Multiplying these values gives 9000 / 100, so the simple interest is Rs. 90. Thanks Wrong explanation