Question
Download Solution PDFएक शंकु की तिर्यक ऊँचाई 10 cm है और त्रिज्या 6 cm है। शंकु का कुल पृष्ठीय क्षेत्रफल कितना है?
[π = 3.14 लीजिए]
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिया गया है:
एक शंकु की तिर्यक ऊँचाई 10 cm है और त्रिज्या 6 cm है।
प्रयुक्त सूत्र:
शंकु का वक्र पृष्ठीय क्षेत्रफल = πrl
l2 = r2 + h2
कुल पृष्ठीय क्षेत्रफल = πr(l+r)
गणना:
प्रश्नानुसार,
शंकु का कुल पृष्ठीय क्षेत्रफल है,
⇒ πr(l+r)
⇒ 3.14×6(10+6)
⇒ 3.14×6×16
⇒ 301.44 cm2
∴ सही विकल्प 4 है।
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