यदि वृत्त की परिधि 132 से०मी० हो, तो उस वृत्त का क्षेत्रफल क्या होगा?

Quantitative Aptitude ·Previously asked in HP Patwari 2019

View the full solved paper: HP Patwari 2019

Question

यदि वृत्त की परिधि 132 से०मी० हो, तो उस वृत्त का क्षेत्रफल क्या होगा?

  1. A. 1386 वर्ग से०मी० (Correct answer)
  2. B. 1386 वर्ग से०मी०
  3. C. 1486 वर्ग से०मी०
  4. D. 1320 वर्ग से०मी०

Correct Answer

Option A — 1386 वर्ग से०मी०

Detailed Solution & Explanation

The correct answer is 1386 वर्ग से०मी०.

Key Points

  • Circumference = 2πr → 132 = 2 × (22/7) × r → r = 21 cm.
  • Area = πr² = (22/7) × 21 × 21 = 1386 cm².
  • Note that options (A) and (B) are printed identically (both 1386) in every available copy of this paper; the intended distractor is lost, but the computed value 1386 is correct.

Exam Tip

  • When the circumference is a multiple of 44, the radius comes out whole with π = 22/7 — 44→7, 88→14, 132→21, 176→28.