Question

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

Answer 1

✯ Let the side of a cube be a cm

  As we know that

 Volume of a cube with side a is $a^{3}$

 Given volume of a cube is 729 $cm^{3}$

 ⇒  $a^{3}$ = 729

 ⇒ a = 9

✯ Surface area of cube is 6$a^{2}$ = 6× 81 = 486 $cm^{2}$

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✯ ANSWER →  486$cm^{2}$

Answer 2

Volume of a cube =729cm cube

Let edge of cube =a

then a^3=729=(9)^3

∴

a =9 cm.

Hence surface area =6a^2=6(9)^2cm^2

=6×81

=486cm^2