Question
A man deposited Rs. βx + 800β at 12% per annum
simple interest and earned Rs. 540 as interest after 2 years. Find the interest earned by him if he deposited Rs. 2x at 10% per annum for 2 years at compound interest.ΒSolution
So, {(x + 800) Γ 0.12 Γ 2 = 540 0.24x + 192 = 540 x = 348/0.24 = 1450 So, required interest earned = 2 Γ 1450 Γ 0.21 = Rs. 609
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