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According to the question, 9000 – 6000 = (6000 × r × 24) ÷ (12 × 100) Or, 3000 = 120 × r Or, r = 25 When the sum is invested at compound interest, Effective rate of interest = (r + 20) ÷ 3 = (25 + 20) ÷ 3 = 15% Effective time period = 1 × 3 = 3 units Amount received = Principal × {1 + (r/100)}time period = 6000 × {1 + (15/100)}3 = 6000 × (1.15)3 = 9125.25
799.99 + 1500.12 ÷ 29.98 × 50.01 = ? × 24.96
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