Study way on Instagram: "Class 9 maths surface area and volume # 📘 Class 9 Maths | Surface Area and Volume | Exercise 11.2 | NCERT Solution In this video, we’ll solve Exercise 11.2 from Class 9 Maths Chapter – Surface Area and Volume step by step. Learn how to find the surface area of a sphere and hemisphere using easy formulas and clear explanation. ✨ In this video you’ll learn: ✔️ Concept of sphere and hemisphere ✔️ Formula 4\pi r^2 and 3\pi r^2 ✔️ Step-by-step solution with r = 11.2 ✔️ Impor