1000 रूपये पर 10% वार्षिक दर से 2 साल का चक्रवृद्धि ब्याज (Compound Interest) है:
Quantitative Aptitude ·Previously asked in HP Patwari 2019
View the full solved paper: HP Patwari 2019
Question
1000 रूपये पर 10% वार्षिक दर से 2 साल का चक्रवृद्धि ब्याज (Compound Interest) है:
- A. रु०1210
- B. रु०210 (Correct answer)
- C. रु०200
- D. रु०190
Correct Answer
Option B — रु०210
Detailed Solution & Explanation
The correct answer is रु० 210.
Key Points
- Amount = P(1 + R/100)^T = 1000 × (1.1)² = रु० 1210.
- Compound Interest = Amount − Principal = 1210 − 1000 = रु० 210.
Exam Tip
- Option (A) रु० 1210 is the amount, not the interest — the commonest error in CI questions. Read whether the question asks for ब्याज or मिश्रधन.
- Shortcut for 2 years: CI = P[2R + R²/100]/100 = 1000[20 + 1]/100 = 210.