Question

the volume of a cube is 729 cm . find its surface area​

Answer 1

Answer:

Side of a cube = 9cm

Surface area = 6 × S*2

= 6 × 81

=426cm*2

Answer 2

Answer:

Surface area = 486 $cm^{2}$

Step-by-step explanation:

Let the side of a cube be a cm.

Volume of cube = $729 cm^{3}$

          $a^{3}$              = $729 cm^{3}$

          $a$               = $\sqrt[3]{729}$

          $a$               =  $9$

Surface area of cube =  $6a^{2}$

                                   = $6$ × $9^{2}$

                                   = $6$ × $81$

                                   =  $486 cm^{2}$