Multiple choice

There are two concentric circles of radius 14 cm. and 7 cm respectively. Find the area between two concentric circles. क्रमशः 14 सेमी. और 7 सेमी. त्रिज्या के दो वृत्त हैं दोनों संकेन्द्रीय वृत्तों के बीच का क्षेत्रफल ज्ञात कीजिए।

  1. 616 cm2/सेमी2

  2. 462 cm2/सेमी2

  3. 154 cm2/सेमी2

  4. 654 cm2/सेमी2
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B Correct answer
Explanation

Area between circles = π(R² - r²) where R = 14, r = 7. Area = π(14² - 7²) = π(196 - 49) = π(147). Using π = 22/7: Area = (22/7) × 147 = 22 × 21 = 462 cm².

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