Q1
What is the surface area formula for a cube?
A6 × side²
Bside³
C4 × side
Dside × side
ICSEClass 8 (ICSE)MathematicsCh 21 · Topic 1
Surface Area, Volume and Capacity
Surface area measures the total area covering a 3D shape, while volume measures the space inside it, both essential for solving real-world p
Core concept
The surface area of a cube is 6 × side², while the surface area of a cuboid is 2(lb + bh + hl), where l, b, h are length, breadth, height.
How it works
The volume of a cube is side³, while the volume of a cuboid is length × breadth × height.
Why it matters
Capacity measures how much a container can hold, often measured in litres, and is closely related to volume (1 litre = 1000 cm³).
Key detail
These calculations are useful in real life for tasks like determining paint needed for walls or water a tank can hold.
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Keywords worth remembering
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Quick notes
• Cube surface area = 6 × side².
• Cuboid surface area = 2(lb+bh+hl).
• Cube volume = side³.
• Cuboid volume = length × breadth × height.
• Capacity measures how much a container holds.
• 1 litre = 1000 cm³.
• These help calculate paint or water needed.
• Surface area and volume are practical real-life skills.