Question
Download Solution PDFएक गेंद का पृष्ठीय क्षेत्रफल 9π वर्ग इकाई होने के लिए, गेंद का व्यास (इकाइयों में) कितना होना चाहिए?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया है:
पृष्ठीय क्षेत्रफल = 9π
प्रयुक्त सूत्र:
गोले का पृष्ठीय क्षेत्रफल = 4πr2
गणना:
⇒ 9π = 4πr2
⇒ r2 = 9/4
⇒ r = 3/2 = 1.5
⇒ व्यास = 2r = 2 × 3/2 = 3 इकाई
∴ सही उत्तर 3 है।
Last updated on Jul 17, 2025
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