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Surface Areas and Volumes

  • Curve Surface area of combination of solids:

 

    • Curved surface area of a cuboid = 2h (l + b)

 1

    • Curved surface area of a cube = 4a2

 2

    • Curved surface area (CSA) of a cylinder = rh

3

    • Slant height of the cone, where h is the height of the cone

Curved surface area (CSA) of a cone = πrl

 

4

    • Curved surface area (CSA) of a hemisphere = r2

 

6

 

Note: Height of the hemisphere = Radius of the hemisphere

 

Example:

A toy is in the form of a hemisphere…

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