Question
Download Solution PDFबैडमिंटन खेलने के लिए इस्तेमाल की जाने वाली चिड़ी एक अर्धगोले पर रखे शंकु के छिन्नक के आकार का होता है। छिन्नक के व्यास 5 सेमी और 2 सेमी हैं, चिड़ी की कुल ऊँचाई 7 सेमी है। बाह्य पृष्ठीय क्षेत्रफल ज्ञात कीजिए।
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFr = 1 सेमी, R = 2.5 सेमी, h = 7 सेमी
छिन्नक की ऊँचाई = 7 - 1 = 6 सेमी
⇒ l = √[h2 + (R – r)]2
⇒ l = √[(6)2 + (2.5 – 1)2]
⇒ l = √(36 + 2.25)
⇒ तिर्यक ऊँचाई, l = 6.2 सेमी
बाह्य पृष्ठीय क्षेत्रफल = (छिन्नक का वक्र पृष्ठीय क्षेत्रफल) + (अर्धगोले का वक्र पृष्ठीय क्षेत्रफल)
⇒ बाह्य पृष्ठीय क्षेत्रफल = 22/7 × (r + R) × l + 2 × (22/7) × r2
⇒ बाह्य पृष्ठीय क्षेत्रफल = 22/7 × [(1 + 2.5)6.2 + 2 × (1)2]
⇒ बाह्य पृष्ठीय क्षेत्रफल = 22/7 × (3.5 × 6.2 + 2)
⇒ बाह्य पृष्ठीय क्षेत्रफल = 22/7 × (21.7 + 2) = 74.29 सेमी2
Last updated on Jun 11, 2025
-> The RRB NTPC Admit Card 2025 has been released on 1st June 2025 on the official website.
-> The UPSC Prelims Result 2025 and UPSC IFS Result 2025 has been released @upsc.gov.in
-> Railway Recruitment Board activated the RRB ALP application form 2025 correction link, candidates can make the correction in the application form till 31st May 2025.
-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.
-> The Railway Recruitment Board (RRB) has released the official RRB ALP Notification 2025 to fill 9,970 Assistant Loco Pilot posts.
-> The official RRB ALP Recruitment 2025 provides an overview of the vacancy, exam date, selection process, eligibility criteria and many more.
->The candidates must have passed 10th with ITI or Diploma to be eligible for this post.
->The RRB Assistant Loco Pilot selection process comprises CBT I, CBT II, Computer Based Aptitude Test (CBAT), Document Verification, and Medical Examination.
-> This year, lakhs of aspiring candidates will take part in the recruitment process for this opportunity in Indian Railways.
-> Serious aspirants should prepare for the exam with RRB ALP Previous Year Papers.
-> Attempt RRB ALP GK & Reasoning Free Mock Tests and RRB ALP Current Affairs Free Mock Tests here