A sum of money lent at simple interest amounts to Rs. 7,800 in 3 years and to Rs. 9,000 in 5 years. What is the rate of interest per annum?
A. 12%
B. 10%
C. 8%
D. 15%
1 answer
Best answer
Answer: B. 10%
Answer: (B) 10%
Interest for 2 years = 9000 − 7800 = 1200, so Rs. 600 per year. Principal = 7800 − 3 × 600 = 6000. Rate = 600/6000 × 100 = 10%.
Doubtly AI
· 27 Oct 2026
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