उस अर्धगोले का कुल पृष्ठीय क्षेत्रफल (cm2 में) ज्ञात कीजिए जिसकी त्रिज्या 36 cm है और π = 3.14 है।

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UP Police SI (दरोगा) Official PYP (Held On: 16 Nov 2021 Shift 3)
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  1. 13208.32
  2. 15208.32
  3. 12208.32
  4. 14208.32

Answer (Detailed Solution Below)

Option 3 : 12208.32
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UP Police SI (दरोगा) Official PYP (Held On: 2 Dec 2021 Shift 1)
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Detailed Solution

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दिया गया है:

त्रिज्या (r) = 36 सेमी

π = 3.14

प्रयुक्त सूत्र:

 गोलाद्र्ध  का कुल पृष्ठीय क्षेत्रफल = 3πr2

गणना:

कुल पृष्ठीय क्षेत्रफल = 3 × 3.14 × 362

⇒ कुल पृष्ठीय क्षेत्रफल = 3 × 3.14 × 1296

⇒ कुल पृष्ठीय क्षेत्रफल = 12208.32 सेमी2

∴ सही उत्तर विकल्प (3) है।

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