A person lent a sum of ₹30,000 on simple interest for 12 years, with an interest rate of 8% per annum for the first 4 years, 10% per annum for the next 3 years, and 15% per annum for last 5 years. How much interest (in ₹) will he earn at the end of 12 years?
A.41100✓ Correct
B.38000
C.40200
D.40800
Explanation
Total SI = 30000×(8×4 + 10×3 + 15×5)/100 = 300×(32+30+75) = 300×137 = ₹41,100.
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