Скачать или смотреть 8th Class Maths | Mensuration 9.2 | Lateral & Total Surface Area of Cube and Cuboid |1to 4 Problems

YouTube Description (3000 characters)

Welcome to this detailed video on 8th Class Mathematics – Chapter 9: MENSURATION (Exercise 9.2, Problems 1 to 4).
In this lesson, we clearly solve four important problems related to Cube and Cuboid, focusing on Lateral Surface Area (LSA) and Total Surface Area (TSA).

🟦 Topics Covered in This Video
🔹 Problem 1

Finding the Lateral Surface Area (LSA) of a cuboid using the formula:
LSA = 2h(l + b)
Stepwise calculation with proper substitution and explanation.

🔹 Problem 2

Finding the Total Surface Area (TSA) of a cuboid using:
TSA = 2(lb + bh + hl)
We clearly identify length, breadth, height and compute each term.

🔹 Problem 3

Finding the Lateral Surface Area (LSA) of a cube using:
LSA = 4a²
We explain why a cube has 4 equal side faces and how lateral area is calculated.

🔹 Problem 4

Finding the Total Surface Area (TSA) of a cube using:
TSA = 6a²
Complete explanation with diagram-based understanding.

🟩 What Students Will Learn

Difference between LSA and TSA

How to identify dimensions of cube & cuboid

Step-by-step substitution

Writing answers with correct units

Concept clarity for exams

Real-life applications of mensuration

🟧 Why This Video Is Useful?

Perfect for AP & TS State Syllabus

Useful for CBSE Class 8 as well

Clear, slow, and simple explanation

Complete solutions to Exercise 9.2 Problems 1–4

Helps in revision and exam preparation

Teacher-friendly and student-friendly content

⏱️ Chapters

00:00 – Introduction
00:40 – What is LSA & TSA?
02:10 – Problem 1 (LSA of Cuboid)
07:20 – Problem 2 (TSA of Cuboid)
13:40 – Problem 3 (LSA of Cube)
18:10 – Problem 4 (TSA of Cube)
23:00 – Summary & Important Points

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