Question
The interest earned when a sum is invested at simple
interest of 25% p.a., for 3 years, is Rs. 9000. What will be the total amount received after 2 years on investing the same sum at compound interest (compounded annually) of 10% interest p.a.?Solution
Let the sum invested = Rs. Y According to the question, (Y × 3 × 25) ÷ 100 = 9000 So, Y = (9000/0.75) = 12000 So, required amount received = 12000(1 + 10/100)2 = 12000(11/10)2 = Rs. 14520
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