Question

find the volume of a cube , one face of which has an area of 81m square

Answer 1

Hey there!

Given, Area of one face of a cube is 81m²

Faces of a cube are in the shape of square.

We know that,
Area of square = ( side)²

Now, Given Area = 81m²


Side = √Area
= √81
= 9m .

Now,
We know that, Volume of cube = ( side)³

Volume
= ( Side) ³
=9³
=729m³

Therefore, Volume of cube whose one face area equals 81m² is 729m³

Answer 2

Hi,

Please see the attached file!


Thanks