Railway Recruitment Board Mathematics — Question 1713
Question
The difference between the compound interest and simple interest on a sum for 2 years at 10% per annum is ₹50. What is the sum?
- 4000
- 6000
- 5000
- 5500
Correct answer
C — 5000
Explanation (English)
For 2 years, CI − SI = P × (R/100)² = P × (0.10)² = 0.01P. So 0.01P = 50 → P = ₹5000.
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