Question
Download Solution PDFThe height and the slant height of a right circular cone are given as 3√23 cm and 16 cm respectively. Approximating π by 22/7, find the curved surface area of the same cone.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Height of cone = 3√ 23 cm
Slant height of cone = 16 cm
Formula:
l2 = h2 + r2
Area of the curved surface of a cone = πrl
Where r is the radius, h = height, and l is the slant height of the cone.
Calculation:
According to the given data,
⇒ r = √ [162 – (3√23)2]
⇒ √[256 - 207]
⇒ √49 = 7 cm
So, Curved surface area = (22/7) × 7 × 16 = 352 cm2
∴ The curved surface area of the cone is 352 cm2.
Last updated on Jun 2, 2025
-> The RRB NTPC Admit Card 2025 has been released on 1st June 2025 on the official website.
-> The RRB Group D Exam Date will be soon announce on the official website. Candidates can check it through here about the exam schedule, admit card, shift timings, exam patten and many more.
-> A total of 1,08,22,423 applications have been received for the RRB Group D Exam 2025.
-> The RRB Group D Recruitment 2025 Notification was released for 32438 vacancies of various level 1 posts like Assistant Pointsman, Track Maintainer (Grade-IV), Assistant, S&T, etc.
-> The minimum educational qualification for RRB Group D Recruitment (Level-1 posts) has been updated to have at least a 10th pass, ITI, or an equivalent qualification, or a National Apprenticeship Certificate (NAC) granted by the NCVT.
-> This is an excellent opportunity for 10th-pass candidates with ITI qualifications as they are eligible for these posts.
-> The selection of the candidates is based on the CBT, Physical Test, and Document Verification.
-> Prepare for the exam with RRB Group D Previous Year Papers.