Surface Areas and Volumes

• Curve Surface area of combination of solids:

 

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

 

• • Curved surface area of a cube = 4a²

 

• • Curved surface area (CSA) of a cylinder = 2πrh

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

Curved surface area (CSA) of a cone = πrl

 

• • Curved surface area (CSA) of a hemisphere = 2πr²

 

 

Note: Height of the hemisphere = Radius of the hemisphere

 

Example:

A toy is in the form of a hemisphere…