alleryकिसी दिए गए परिबद्ध आयतन के लिए किस ठोस का पृष्ठीय क्षेत्रफल सबसे कम होता है?
Aशंकु
Bघन
Cगोला
Dबेलन
Answer & Solution
Correct answer: C. गोला
साबुन के बुलबुले गोलाकार होते हैं क्योंकि एक निश्चित आयतन के लिए गोला पृष्ठीय क्षेत्रफल को न्यूनतम करता है।
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