Area and Perimeter practice question for Railways, SSC. Review the correct answer and explanation, then continue with related practice below.
English: The difference between area of a square and its inscribed circle is 42 cm². Find the side of square. Take π = 22 7. Hindi:
एक वर्ग और उसमें अंतःस्थित वृत्त के क्षेत्रफलों का अंतर 42 सेमी² है।
वर्ग की भुजा ज्ञात कीजिए। π = 22
7 लें।
Answer and explanation are free to read — no sign-in required.उत्तर और व्याख्या पढ़ने के लिए साइन-इन आवश्यक नहीं है।
Correct Answerसही उत्तर
B. 14 cmB. 14 सेमी
Explanationव्याख्या
For side a, difference = a² - π(a
2)² = a²(1 - π
4).
Using π = 22
7, factor = 3
14.
Thus 3a²
14 = 42 gives a² = 196, a = 14.
अंतर = 3a²
14 = 42।
अतः a² = 196 और a = 14 सेमी।
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