Multiple choice

The total surface area of a hemisphere is 41.58 cm.2. Find its curved surface area. एक गोलार्द्ध का कुल पृष्ठ क्षेत्रफल 41.58 सेमी.2 है। इसका वक्र पृष्ठ क्षेत्रफल ज्ञात कीजिये ।

  1. 27.72 cm.2/ सेमी.2

  2. 55.44 cm.2/ सेमी.2

  3. 9.24 cm.2/ सेमी.2

  4. 13.86 cm.2/ सेमी.2
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A Correct answer
Explanation

Total surface area of hemisphere = 3πr². Curved surface area = 2πr². Therefore, curved surface area = (2/3) × total surface area = (2/3) × 41.58 = 27.72 cm².

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