Question
Simple interest on Rs. 1500 at R% per annum for 2 years is Rs. 240. Find the simple interest on Rs. 2000 at (R + 5)% per annum for 4 years.
Solution
According to question, 240 = 1500 × R% × 2 R = 240/30 = 8 Therefore, required interest = 2000 × (8 + 5)% × 4 = Rs. 1040
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