Surface Area and Volume of Solids

• Surface areas of cuboid:

 

Lateral surface area of the cuboid = 2h (l + b)

Total surface area of the cuboid = 2 (lb + bh + hl)

Note: Length of the diagonal of a cuboid =

Example: 

Find the edge of a cube whose surface area is 294 m².

Solution: 

Let the edge of the given cube be a.

∴ Surface area of the cube = 6a²

Given, 6a² = 294

• Surface areas of cube: 

Lateral surface area of the cube = 4a²

Total surface area of the cube = 6a²

Note: Length of the diagonal of a…