Surface Area & Volume | Class 9 CBSE | NCERT Ex - 11.1 | IMP problems + Tips & Tricks | Lecture - 1

📘 Class 9 Maths – Surface Area & Volume of a Cone In this video, we cover the complete Surface Areas and Volumes – Cone portion as per the latest CBSE Class 9 Maths syllabus (2025-26, Code 041).CBSE officially includes: ✔ Surface area of a right circular cone ✔ Curved (lateral) surface area – CSA = πrl ✔ Total surface area – TSA = πr(r + l) ✔ Volume of a right circular cone – V = (1/3)πr²h ✔ Relation between slant height, height & radius: l² = h² + r² ✔ Applications in real-life word problems (canvas, cost, capacity, etc.) NCERT also includes: Finding height, radius, slant height using Pythagoras Practical questions: tents, conical vessels, ice-cream cones, waste materials Unit conversions: cm, m, cm², m², cm³, m³, litres Mixed problems combining CSA, TSA and volume This chapter builds strong understanding of 3D geometry, mensuration, and real-life mathematical applications. ⭐ What You Will Learn in This Video Concept of right circular cone Formula derivation & shortcuts How to find CSA, TSA, slant height, volume Exam-oriented NCERT questions Important tricks for fast calculation Previous year CBSE-based questions 🔍 Keywords / Tags for SEO Class 9 mathssurface area and volume coneCBSE class 9 conecurved surface area of conetotal surface area of conevolume of conecone mensuration class 9NCERT class 9 maths chapter 11/13cone formulas class 9class 9 maths one-shotCBSE 2025 syllabus maths 🔥 Hashtags #class9maths #surfaceareaandvolume #cone #cbseclass9 #mensuration #ncertmaths #mathstricks #mathscone #cbse2026 #class9