5 मीटर ऊँचे एक शंक्वाकार डेरे के लिए कितना कपड़ा चाहिए जिसमे 2.5 मीटर ऊँची बल्ली केंद्र से 6 मीटर की दूरी तक सीधी खड़ी हो सके
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490 m² कपड़ा चाहिए 5 मीटर ऊँचे एक शंक्वाकार डेरे के लिए जिसमे 2.5 मीटर ऊँची बल्ली केंद्र से 6 मीटर की दूरी तक सीधी खड़ी हो सके
Step-by-step explanation:
(r - 6) / r = 2.5/5
=> (r - 6) /r = 1/2
=> 2r - 12 = r
=> r = 12 m
Slant height² = 5² + 12²
=> Slant height² = 25 + 144
=> Slant height² = 169
=> Slant height = 13 m
कपड़ा चाहिए = π r (slant Height)
= 3.14 * 12 * 13
= 490 m²
If Cloth is at bottom also then π r ² will be added
= 452 m² will also added in 490 m²
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