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:

  1. A. रु०1210
  2. B. रु०210 (Correct answer)
  3. C. रु०200
  4. 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.