Don't Calculate! ❌ Use Common Sense to Solve Pyramid Questions | SSC CGL 2026

Описание: In this video, we tackle a challenging Right Pyramid problem with an Equilateral Triangle base, a trending topic for SSC CGL Mains and CHSL exams. Most students waste time calculating the full Total Surface Area (TSA) or Slant Height using long formulas. I will show you how to use logical option elimination to solve this in just 10 seconds without lifting your pen!

We discuss the relationship between the base height and the pyramid's slant height, and why the height must be less than the altitude of the base triangle.

💡 Key Concepts Covered:

Right Pyramid vs. Oblique Pyramid

Equilateral Triangle Base properties (In-radius vs Height)

Difference between Slant Height and Vertical Height

Complete Formula Revision for Prism & Pyramid

⏱️ Timestamps (Chapters):
00:00 - Intro: How to solve in 10 seconds?
00:24 - The Question: Right Pyramid with Equilateral Base
00:50 - Understanding the Area Logic (270√3 vs 300√3)
01:50 - The "Height Logic": Why Height must be 15
03:00 - Slant Height vs Perpendicular Height
04:00 - Visualizing the Opened Pyramid (Net Diagram)
05:11 - In-radius Concept: Why base length is 5 (not 10)
08:00 - Why Option "10" is eliminated
09:30 - Important Formulas: Volume, CSA & TSA of Pyramid
11:25 - Summary: The 10-Second Exam Approach (Best Trick)
13:50 - Conclusion & Mains Strategy

📚 Important Formulas for Pyramid:

Volume: 1/3 × (Area of Base) × Height

CSA (Lateral Surface Area): 1/2 × (Perimeter of Base) × Slant Height

TSA: CSA + Area of Base

If you found this logical approach helpful, please LIKE the video and SUBSCRIBE for more Clarity for SSC!

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