Question

Find the volume of a cube,one face of which has an area of 81m2

Answer 1

hey here is ur answer

area of cube of one side =s*s
=81=9*9
side =9m

volume of cube = s*s*s or area of one side * s

=81*9

=729m cube

I hope this helps you

Answer 2

Let each side of cube be x m. Then area of each face = x * x i.e. x^2 m^2. But area of each face is given = 81m^2. Therefore, x^2= 81 => x =9. So each side of cube is 9 m. Hence volume of cube is 9^3 m^3 i.e. 729m^3