Question

Find the volume and surface area of a cube length of whose edge is 8 cm. please give right answer​

Answer 1

Answer:

The answer is in the image

Answer 2

Given:

✰ The length of edge of a cube = 8 cm

To find:

✠ The volume of a cube.

✠ The total surface area of a cube.

Solution:

A cube is rectangular solid whose face is a square.

We will calculate both the volume and the surface area of a cube by using formula and doing required calculations.

Formula:

Volume of cube = ( it's edge )³

• Volume of cube = a³

Here, a is the edge of a cube.

put the values in the formula,

⟹ Volume of cube = 8³

⟹ Volume of cube = 8 × 8 × 8

⟹ Volume of cube = 512 cm³

∴ The volume of a cube = 512 cm³

Now, surface area of cube

Formula:

Total surface area = 6 ( edge )²

• Total surface area = 6a²

Here, a is the edge of a cube.

put the values in the formula,

⟹ Total surface area = 6 × ( 8 )²

⟹ Total surface area = 6 × ( 8 × 8 )

⟹ Total surface area = 6 × 64

⟹ Total surface area = 384 cm²

∴ The surface area of a cube = 384 cm²

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