Question
A man deposited Rs. βx + 900β at 12% per annum
simple interest and earned Rs. 528 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 + 900) Γ 0.12 Γ 2 = 528 0.24x + 216 = 528 x = 312/0.24 = 1900 So, required interest earned = 2 Γ 1900 Γ 0.21 = Rs. 546
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