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Surface Areas and Volumes
High trendapprox. 6 marksSections C/D — combinations of solids.
CBSE 2027 — dates, rules and official papers →Ask the tutor1Keep π = 22/7 (or 3.14) consistent throughout the solution and state the unit (cm² / cm³) at every stage.
Notesformulae · proofs · mind-map — one view
Learn the 2 conceptsteach yourself first, then practise each
Cylinder, cone and sphere — surface area and volume1–3 marks Visual
Memorise the four core formulas; everything else builds on them.
Combinations of solids (cone on cylinder, hemisphere on cube, …)3–5 marks Visual
Add the visible surface areas and add the volumes — never both for the joining face.
When you’re ready — practise or test the whole topic