Mathematics · Mensuration
ऊंचाई h और त्रिज्या R वाले एक लंब वृत्तीय शंकु को आधार से h4 की दूरी पर आधार के समानांतर एक तल द्वारा काटा जाता है। परिणामी छोटे शंकु और छिन्नक (frustum) के वक्र पृष्ठीय क्षेत्रफलों का अनुपात है:
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