Question
The simple interest on Rs. ‘p’ at 15% p.a. for 2
years is 450 more than the simple interest on Rs. (p + 1000) at 10% p.a. for 2.5 years. Find the compound interest on Rs. 'p' at 10% for 2 years.Solution
According to the question, x × 15% × 2 – (x + 1000) × 10% × 2.5 = 450 0.30x – 0.25x – 250 = 450 0.05x = 700 x = 14000 Required compound interest = 14000(1 + 10/100)2 – 14000 = 16940 – 14000 = Rs.2940
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