X lent ₹6,000 to Y for 3 years and ₹4,000 to Z for 2 years, both at the same simple interest rate. In total, he received ₹2,000 as interest from both. What is the rate of interest per annum(nearest integer)?

উত্তর দেখান ও ব্যাখ্যা

উত্তর: (A) 8%

ব্যাখ্যা

(6000×3 + 4000×2) × r/100 = 2000 gives 260r = 2000, r ≈ 7.7 ≈ 8%.