Multiple choice

Find the length of the chord that is at a distance of 21 cm from the center of a circle of radius 29 cm. उस जीवा की लम्बाई ज्ञात कीजिए जो 29 सेमी त्रिज्या वाले वृत्त के केन्द्र से 21 सेमी की दूरी पर है।

  1. 36 cm/सेमी

  2. 42 cm/सेमी

  3. 40 cm/सेमी

  4. 20 cm/सेमी
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C Correct answer
Explanation

For a circle, chord length L at distance d from center with radius r is L = 2√(r² - d²). Here: 2√(29² - 21²) = 2√(841-441) = 2√400 = 2 × 20 = 40 cm.

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